<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:1b0b8c12-b583-450f-a177-6060a9a66c37,g:3e5655d3-27fb-40dc-9d9f-48b6d536fdfa-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://lucidmotors.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="lcid-20251231.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_60fa407d-de97-4559-bea4-72c89618c0bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_0f5f5f67-0f9f-4349-9d3b-ec3b32c29325" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_60fa407d-de97-4559-bea4-72c89618c0bf" xlink:to="loc_us-gaap_StatementTable_0f5f5f67-0f9f-4349-9d3b-ec3b32c29325" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_d6dbd0d6-7208-458c-8715-0523a7d67d3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_0f5f5f67-0f9f-4349-9d3b-ec3b32c29325" xlink:to="loc_us-gaap_StatementClassOfStockAxis_d6dbd0d6-7208-458c-8715-0523a7d67d3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_d6dbd0d6-7208-458c-8715-0523a7d67d3a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_d6dbd0d6-7208-458c-8715-0523a7d67d3a" xlink:to="loc_us-gaap_ClassOfStockDomain_d6dbd0d6-7208-458c-8715-0523a7d67d3a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_8e2cd3e6-3f66-4809-9920-2ec0b4dfe005" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_d6dbd0d6-7208-458c-8715-0523a7d67d3a" xlink:to="loc_us-gaap_ClassOfStockDomain_8e2cd3e6-3f66-4809-9920-2ec0b4dfe005" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_9b2d72e8-8887-4748-b7ce-cf6373914fa3" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_8e2cd3e6-3f66-4809-9920-2ec0b4dfe005" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_9b2d72e8-8887-4748-b7ce-cf6373914fa3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_b3930da7-18bd-484e-890e-2b36f70fab8c" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_8e2cd3e6-3f66-4809-9920-2ec0b4dfe005" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_b3930da7-18bd-484e-890e-2b36f70fab8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_9c6e904f-bcdf-41c8-bfbc-5c1e7af1743a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_60fa407d-de97-4559-bea4-72c89618c0bf" xlink:to="loc_us-gaap_AssetsAbstract_9c6e904f-bcdf-41c8-bfbc-5c1e7af1743a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_9cdac012-25bb-46eb-aa16-3e6410195eff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_9c6e904f-bcdf-41c8-bfbc-5c1e7af1743a" xlink:to="loc_us-gaap_AssetsCurrentAbstract_9cdac012-25bb-46eb-aa16-3e6410195eff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_59b36ed9-404b-485c-9e54-d6fa61b78ba9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_9cdac012-25bb-46eb-aa16-3e6410195eff" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_59b36ed9-404b-485c-9e54-d6fa61b78ba9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestments_c81849ed-7135-44f6-acb2-2ca6ec8c16d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_9cdac012-25bb-46eb-aa16-3e6410195eff" xlink:to="loc_us-gaap_ShortTermInvestments_c81849ed-7135-44f6-acb2-2ca6ec8c16d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_ab5e5ae0-f0e6-4d73-9767-1caf8f74594c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_9cdac012-25bb-46eb-aa16-3e6410195eff" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_ab5e5ae0-f0e6-4d73-9767-1caf8f74594c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_ac6e62e9-bec0-4e61-b283-cda9dd928816" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_9cdac012-25bb-46eb-aa16-3e6410195eff" xlink:to="loc_us-gaap_InventoryNet_ac6e62e9-bec0-4e61-b283-cda9dd928816" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_d01bfc68-866c-4d3e-b99c-a9911a08675c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_9cdac012-25bb-46eb-aa16-3e6410195eff" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_d01bfc68-866c-4d3e-b99c-a9911a08675c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_f89533bf-0c25-4869-8073-1f61a861625f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_9cdac012-25bb-46eb-aa16-3e6410195eff" xlink:to="loc_us-gaap_OtherAssetsCurrent_f89533bf-0c25-4869-8073-1f61a861625f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_fab9d20f-8f21-495d-ae80-2fba633a3a47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_9cdac012-25bb-46eb-aa16-3e6410195eff" xlink:to="loc_us-gaap_AssetsCurrent_fab9d20f-8f21-495d-ae80-2fba633a3a47" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_782dedc7-97d9-4372-93aa-69a474dd2b63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_9c6e904f-bcdf-41c8-bfbc-5c1e7af1743a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_782dedc7-97d9-4372-93aa-69a474dd2b63" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_7ccd967b-84f8-4c53-9a21-06551304ef07" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_9c6e904f-bcdf-41c8-bfbc-5c1e7af1743a" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_7ccd967b-84f8-4c53-9a21-06551304ef07" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermInvestments_217e06e4-04ef-4e09-b682-3b66e64a16fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_9c6e904f-bcdf-41c8-bfbc-5c1e7af1743a" xlink:to="loc_us-gaap_LongTermInvestments_217e06e4-04ef-4e09-b682-3b66e64a16fe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_4b7f0dbf-4c4a-400e-b2d8-bee59f4f00d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_9c6e904f-bcdf-41c8-bfbc-5c1e7af1743a" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_4b7f0dbf-4c4a-400e-b2d8-bee59f4f00d5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_fd745cb6-d29a-4751-97d2-0cda8411ee49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_9c6e904f-bcdf-41c8-bfbc-5c1e7af1743a" xlink:to="loc_us-gaap_Assets_fd745cb6-d29a-4751-97d2-0cda8411ee49" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_72922e90-103b-4772-9d8b-779daf38564f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_60fa407d-de97-4559-bea4-72c89618c0bf" xlink:to="loc_us-gaap_LiabilitiesAbstract_72922e90-103b-4772-9d8b-779daf38564f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_71c3aaff-2f1e-43e3-8ef9-f5cbbd1cad42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_72922e90-103b-4772-9d8b-779daf38564f" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_71c3aaff-2f1e-43e3-8ef9-f5cbbd1cad42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_216b15e7-2704-4e9b-a1ce-e5b4423447fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_71c3aaff-2f1e-43e3-8ef9-f5cbbd1cad42" xlink:to="loc_us-gaap_AccountsPayableCurrent_216b15e7-2704-4e9b-a1ce-e5b4423447fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_7f363ec3-0b0d-4974-8d84-52e06bec2103" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_71c3aaff-2f1e-43e3-8ef9-f5cbbd1cad42" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_7f363ec3-0b0d-4974-8d84-52e06bec2103" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019b4b47-1d7b-7e3c-a394-42a770d2140c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_71c3aaff-2f1e-43e3-8ef9-f5cbbd1cad42" xlink:to="loc_us-gaap_LongTermDebtCurrent_019b4b47-1d7b-7e3c-a394-42a770d2140c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_59d23f90-bb18-4a23-9616-f2b0839db1c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_71c3aaff-2f1e-43e3-8ef9-f5cbbd1cad42" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_59d23f90-bb18-4a23-9616-f2b0839db1c0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_b32e5a11-027c-4d4e-9a9d-79c4d416a441" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_71c3aaff-2f1e-43e3-8ef9-f5cbbd1cad42" xlink:to="loc_us-gaap_LiabilitiesCurrent_b32e5a11-027c-4d4e-9a9d-79c4d416a441" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_05f6ba2e-796f-4998-8992-25d6438a4b33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_72922e90-103b-4772-9d8b-779daf38564f" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_05f6ba2e-796f-4998-8992-25d6438a4b33" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_f60b6200-78c3-4f2b-90d8-bad9c3b672a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_72922e90-103b-4772-9d8b-779daf38564f" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_f60b6200-78c3-4f2b-90d8-bad9c3b672a0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_b8c58e67-8880-40b2-802f-7c9ba728adef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_72922e90-103b-4772-9d8b-779daf38564f" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_b8c58e67-8880-40b2-802f-7c9ba728adef" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_116ba100-a3ec-4e29-a0de-4eac39b67635" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_72922e90-103b-4772-9d8b-779daf38564f" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_116ba100-a3ec-4e29-a0de-4eac39b67635" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_3023208e-9315-433d-86f6-55a5fc3c5e0d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_72922e90-103b-4772-9d8b-779daf38564f" xlink:to="loc_us-gaap_Liabilities_3023208e-9315-433d-86f6-55a5fc3c5e0d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_9f68e04d-3879-4497-befc-8000857c557b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_60fa407d-de97-4559-bea4-72c89618c0bf" xlink:to="loc_us-gaap_CommitmentsAndContingencies_9f68e04d-3879-4497-befc-8000857c557b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityNumberOfSharesRedemptionValueAndOtherDisclosuresAbstract_59236dca-8a06-4f6a-aa2c-24048d244982" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityNumberOfSharesRedemptionValueAndOtherDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_60fa407d-de97-4559-bea4-72c89618c0bf" xlink:to="loc_us-gaap_TemporaryEquityNumberOfSharesRedemptionValueAndOtherDisclosuresAbstract_59236dca-8a06-4f6a-aa2c-24048d244982" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_ee5b24b5-b969-42a9-9907-ddd8c11ae3de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityNumberOfSharesRedemptionValueAndOtherDisclosuresAbstract_59236dca-8a06-4f6a-aa2c-24048d244982" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_ee5b24b5-b969-42a9-9907-ddd8c11ae3de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_dffc4073-0e0c-4dee-b0af-4c187f88bed6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_60fa407d-de97-4559-bea4-72c89618c0bf" xlink:to="loc_us-gaap_StockholdersEquityAbstract_dffc4073-0e0c-4dee-b0af-4c187f88bed6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_117f5954-7ad3-42c6-b830-d4da25ed4ae8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_dffc4073-0e0c-4dee-b0af-4c187f88bed6" xlink:to="loc_us-gaap_CommonStockValue_117f5954-7ad3-42c6-b830-d4da25ed4ae8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_460d0ac6-1a50-4fb8-bda8-1105cfd6aae2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_dffc4073-0e0c-4dee-b0af-4c187f88bed6" xlink:to="loc_us-gaap_AdditionalPaidInCapital_460d0ac6-1a50-4fb8-bda8-1105cfd6aae2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonValue_c08e290b-fc2e-413f-ac70-42cd89ef5c5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_dffc4073-0e0c-4dee-b0af-4c187f88bed6" xlink:to="loc_us-gaap_TreasuryStockCommonValue_c08e290b-fc2e-413f-ac70-42cd89ef5c5f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_00f027e2-de57-481f-8937-ee71da17913a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_dffc4073-0e0c-4dee-b0af-4c187f88bed6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_00f027e2-de57-481f-8937-ee71da17913a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_d0936300-6393-4735-804d-aad7956b1113" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_dffc4073-0e0c-4dee-b0af-4c187f88bed6" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_d0936300-6393-4735-804d-aad7956b1113" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_b7b0d31c-8fc5-4692-8c4b-d05e263b2e83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_dffc4073-0e0c-4dee-b0af-4c187f88bed6" xlink:to="loc_us-gaap_StockholdersEquity_b7b0d31c-8fc5-4692-8c4b-d05e263b2e83" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_8f97a38e-5506-4f2a-adaa-eb3701bc43e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_60fa407d-de97-4559-bea4-72c89618c0bf" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_8f97a38e-5506-4f2a-adaa-eb3701bc43e7" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="lcid-20251231.xsd#CONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/CONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_f8718418-a741-46ae-a555-08a2c5c38b22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_StatementTable_f8718418-a741-46ae-a555-08a2c5c38b22" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_c73f3fc4-fd15-4100-9c78-6229ec0af1f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_f8718418-a741-46ae-a555-08a2c5c38b22" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_c73f3fc4-fd15-4100-9c78-6229ec0af1f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_c73f3fc4-fd15-4100-9c78-6229ec0af1f5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_c73f3fc4-fd15-4100-9c78-6229ec0af1f5" xlink:to="loc_us-gaap_RelatedPartyDomain_c73f3fc4-fd15-4100-9c78-6229ec0af1f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_26a59c6a-7b80-4480-b136-238cdb1ad90f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_c73f3fc4-fd15-4100-9c78-6229ec0af1f5" xlink:to="loc_us-gaap_RelatedPartyDomain_26a59c6a-7b80-4480-b136-238cdb1ad90f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_a122571e-5011-413f-aa8f-ba44662266db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_26a59c6a-7b80-4480-b136-238cdb1ad90f" xlink:to="loc_us-gaap_RelatedPartyMember_a122571e-5011-413f-aa8f-ba44662266db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_c49cb10e-8a26-4810-ab9c-2bcdff564fd0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_f8718418-a741-46ae-a555-08a2c5c38b22" xlink:to="loc_us-gaap_StatementClassOfStockAxis_c49cb10e-8a26-4810-ab9c-2bcdff564fd0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_c49cb10e-8a26-4810-ab9c-2bcdff564fd0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_c49cb10e-8a26-4810-ab9c-2bcdff564fd0" xlink:to="loc_us-gaap_ClassOfStockDomain_c49cb10e-8a26-4810-ab9c-2bcdff564fd0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_3b706e41-0b1e-435a-b257-2b5385449123" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_c49cb10e-8a26-4810-ab9c-2bcdff564fd0" xlink:to="loc_us-gaap_ClassOfStockDomain_3b706e41-0b1e-435a-b257-2b5385449123" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_846fe411-64bf-49ab-95a7-c01fa7498d19" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3b706e41-0b1e-435a-b257-2b5385449123" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_846fe411-64bf-49ab-95a7-c01fa7498d19" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_095c7b61-a4a3-4aa2-b273-55c7416b8575" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_3b706e41-0b1e-435a-b257-2b5385449123" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_095c7b61-a4a3-4aa2-b273-55c7416b8575" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestments_6e8cf2ad-f164-47b8-9488-373994ae4e47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_ShortTermInvestments_6e8cf2ad-f164-47b8-9488-373994ae4e47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_69d4de12-b349-45ec-962f-d93a9781f64a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_69d4de12-b349-45ec-962f-d93a9781f64a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_5c6b430a-5e2d-4725-88c7-e0fbffbf1058" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_OtherAssetsCurrent_5c6b430a-5e2d-4725-88c7-e0fbffbf1058" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermInvestments_a2b0ee42-ccd3-4d4c-b846-6d3a1726f4e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_LongTermInvestments_a2b0ee42-ccd3-4d4c-b846-6d3a1726f4e5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019bcaa6-5f93-755e-beef-7196a2ab1e1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_LongTermDebtCurrent_019bcaa6-5f93-755e-beef-7196a2ab1e1c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_b3925da9-3ca7-484a-8e7d-6fe7917f0535" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_b3925da9-3ca7-484a-8e7d-6fe7917f0535" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_7b3c73cd-b82b-4ee5-a6dc-5ff3164c9bb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_7b3c73cd-b82b-4ee5-a6dc-5ff3164c9bb4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesAuthorized_a1223b9e-dcde-4294-88cc-55f35f196020" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_TemporaryEquitySharesAuthorized_a1223b9e-dcde-4294-88cc-55f35f196020" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityParOrStatedValuePerShare_f59d63af-4eba-416d-808a-a4f145c25896" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_TemporaryEquityParOrStatedValuePerShare_f59d63af-4eba-416d-808a-a4f145c25896" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesIssued_994f6537-2800-421c-a8ce-9a26a2ed0b42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_TemporaryEquitySharesIssued_994f6537-2800-421c-a8ce-9a26a2ed0b42" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_586c0e63-4c2a-4b18-aa7a-17d7a8919017" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_TemporaryEquitySharesOutstanding_586c0e63-4c2a-4b18-aa7a-17d7a8919017" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockLiquidationPreferenceValue_4ace6242-c372-40fe-8faa-dcecfba0d401" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockLiquidationPreferenceValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_PreferredStockLiquidationPreferenceValue_4ace6242-c372-40fe-8faa-dcecfba0d401" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_aacceafa-87c0-4484-a5ae-b5b3ece96336" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_aacceafa-87c0-4484-a5ae-b5b3ece96336" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_48256876-80ad-4fbb-a457-0b4c3e1e43ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_48256876-80ad-4fbb-a457-0b4c3e1e43ae" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_de9d3ba4-4284-46b3-9bf4-c32104c4ea15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_CommonStockSharesIssued_de9d3ba4-4284-46b3-9bf4-c32104c4ea15" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_e73fb37e-42bf-4f34-869f-ca0b5651441f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_e73fb37e-42bf-4f34-869f-ca0b5651441f" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_ff25f1a7-722f-4ec7-950b-df87eec899b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_TreasuryStockCommonShares_ff25f1a7-722f-4ec7-950b-df87eec899b3" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_d5113019-2071-445a-aa9f-789d2adcbc22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_336605ef-cfef-46fa-9ccc-59dd4e7614c0" xlink:to="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_d5113019-2071-445a-aa9f-789d2adcbc22" xlink:type="arc" order="17"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSSParenthetical" xlink:type="simple" xlink:href="lcid-20251231.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSSParenthetical"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_36418920-205b-4291-86da-15806d7d5a60" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_3a48ea61-e04a-458d-a73b-263e788764c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_36418920-205b-4291-86da-15806d7d5a60" xlink:to="loc_us-gaap_StatementTable_3a48ea61-e04a-458d-a73b-263e788764c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_4b29c20b-0ccf-4e3b-a8e4-7c518f7bb346" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_3a48ea61-e04a-458d-a73b-263e788764c9" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_4b29c20b-0ccf-4e3b-a8e4-7c518f7bb346" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_4b29c20b-0ccf-4e3b-a8e4-7c518f7bb346_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_4b29c20b-0ccf-4e3b-a8e4-7c518f7bb346" xlink:to="loc_us-gaap_RelatedPartyDomain_4b29c20b-0ccf-4e3b-a8e4-7c518f7bb346_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_f68b78d9-50e6-402c-aa77-96ac76ddc0b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_4b29c20b-0ccf-4e3b-a8e4-7c518f7bb346" xlink:to="loc_us-gaap_RelatedPartyDomain_f68b78d9-50e6-402c-aa77-96ac76ddc0b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_63f9d237-1006-4682-9039-f33f8c5500c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_f68b78d9-50e6-402c-aa77-96ac76ddc0b1" xlink:to="loc_us-gaap_RelatedPartyMember_63f9d237-1006-4682-9039-f33f8c5500c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2e1395f3-5018-43ec-8ec8-82c9453418fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_36418920-205b-4291-86da-15806d7d5a60" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_2e1395f3-5018-43ec-8ec8-82c9453418fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_5253c91b-ba07-4438-9fac-c2b0bad0b302" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_36418920-205b-4291-86da-15806d7d5a60" xlink:to="loc_us-gaap_InterestExpenseNonoperating_5253c91b-ba07-4438-9fac-c2b0bad0b302" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_85fe43fc-1b02-446d-b242-d614b5b9c86d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_36418920-205b-4291-86da-15806d7d5a60" xlink:to="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_85fe43fc-1b02-446d-b242-d614b5b9c86d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/CONSOLIDATEDSTATEMENTSOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="lcid-20251231.xsd#CONSOLIDATEDSTATEMENTSOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/CONSOLIDATEDSTATEMENTSOFREDEEMABLECONVERTIBLEPREFERREDSTOCKANDSTOCKHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_6fe6e889-bbd5-4d02-9cd8-8d0e36664f50" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_ec37f6f2-689b-4206-b670-919d961185c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_6fe6e889-bbd5-4d02-9cd8-8d0e36664f50" xlink:to="loc_us-gaap_StatementTable_ec37f6f2-689b-4206-b670-919d961185c8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_55426a7f-7ab1-4c39-a7ae-56de97478e9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_ec37f6f2-689b-4206-b670-919d961185c8" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_55426a7f-7ab1-4c39-a7ae-56de97478e9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_55426a7f-7ab1-4c39-a7ae-56de97478e9c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_55426a7f-7ab1-4c39-a7ae-56de97478e9c" xlink:to="loc_us-gaap_EquityComponentDomain_55426a7f-7ab1-4c39-a7ae-56de97478e9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_160595e5-ecbe-4f0a-9b0e-84c5ed54dd33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_55426a7f-7ab1-4c39-a7ae-56de97478e9c" xlink:to="loc_us-gaap_EquityComponentDomain_160595e5-ecbe-4f0a-9b0e-84c5ed54dd33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_e5ad2f85-ff43-433a-8c7c-c447bd6cb3df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_160595e5-ecbe-4f0a-9b0e-84c5ed54dd33" xlink:to="loc_us-gaap_CommonStockMember_e5ad2f85-ff43-433a-8c7c-c447bd6cb3df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_827fa633-3a93-4330-8712-5def41132bcf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_160595e5-ecbe-4f0a-9b0e-84c5ed54dd33" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_827fa633-3a93-4330-8712-5def41132bcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_2f4b72a0-7294-439e-9c35-029019de247d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_160595e5-ecbe-4f0a-9b0e-84c5ed54dd33" xlink:to="loc_us-gaap_TreasuryStockCommonMember_2f4b72a0-7294-439e-9c35-029019de247d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_ec126c7d-45b6-4294-b55a-45d241d3372b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_160595e5-ecbe-4f0a-9b0e-84c5ed54dd33" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_ec126c7d-45b6-4294-b55a-45d241d3372b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_c8ceb4db-11ab-4a33-a6e5-7b2651e517ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_160595e5-ecbe-4f0a-9b0e-84c5ed54dd33" xlink:to="loc_us-gaap_RetainedEarningsMember_c8ceb4db-11ab-4a33-a6e5-7b2651e517ca" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_c1eecb5f-93cf-4187-99eb-258863b113c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_ec37f6f2-689b-4206-b670-919d961185c8" xlink:to="loc_us-gaap_StatementClassOfStockAxis_c1eecb5f-93cf-4187-99eb-258863b113c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_c1eecb5f-93cf-4187-99eb-258863b113c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_c1eecb5f-93cf-4187-99eb-258863b113c3" xlink:to="loc_us-gaap_ClassOfStockDomain_c1eecb5f-93cf-4187-99eb-258863b113c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_fbf5687f-fd27-405d-b373-aaa4a6bfe5be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_c1eecb5f-93cf-4187-99eb-258863b113c3" xlink:to="loc_us-gaap_ClassOfStockDomain_fbf5687f-fd27-405d-b373-aaa4a6bfe5be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_a50619bc-f12b-4fab-9fe9-2055d1901749" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_fbf5687f-fd27-405d-b373-aaa4a6bfe5be" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_a50619bc-f12b-4fab-9fe9-2055d1901749" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_b95e03c2-31b5-4ad6-8a18-0c45d8ebefd6" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_fbf5687f-fd27-405d-b373-aaa4a6bfe5be" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_b95e03c2-31b5-4ad6-8a18-0c45d8ebefd6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_f67f9c86-8f16-4928-8847-aa6fe719417d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_ec37f6f2-689b-4206-b670-919d961185c8" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_f67f9c86-8f16-4928-8847-aa6fe719417d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_f67f9c86-8f16-4928-8847-aa6fe719417d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_f67f9c86-8f16-4928-8847-aa6fe719417d" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_f67f9c86-8f16-4928-8847-aa6fe719417d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_917d329c-56d7-4c7e-a36d-473404da434d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_f67f9c86-8f16-4928-8847-aa6fe719417d" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_917d329c-56d7-4c7e-a36d-473404da434d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023UnderwritingAgreementMember_019b02a3-a733-72fa-a98a-298563641415" xlink:href="lcid-20251231.xsd#lcid_A2023UnderwritingAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_917d329c-56d7-4c7e-a36d-473404da434d" xlink:to="loc_lcid_A2023UnderwritingAgreementMember_019b02a3-a733-72fa-a98a-298563641415" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023SubscriptionAgreementMember_cfff7e04-64f2-44f8-90ec-b5155c52a756" xlink:href="lcid-20251231.xsd#lcid_A2023SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_917d329c-56d7-4c7e-a36d-473404da434d" xlink:to="loc_lcid_A2023SubscriptionAgreementMember_cfff7e04-64f2-44f8-90ec-b5155c52a756" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024UnderwritingAgreementMember_6b37a7bb-296e-4ef9-9ed1-ee50a44f3ce7" xlink:href="lcid-20251231.xsd#lcid_A2024UnderwritingAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_917d329c-56d7-4c7e-a36d-473404da434d" xlink:to="loc_lcid_A2024UnderwritingAgreementMember_6b37a7bb-296e-4ef9-9ed1-ee50a44f3ce7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024SubscriptionAgreementMember_141b8e93-a0ab-4dd6-bf05-5e3a8efa88f6" xlink:href="lcid-20251231.xsd#lcid_A2024SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_917d329c-56d7-4c7e-a36d-473404da434d" xlink:to="loc_lcid_A2024SubscriptionAgreementMember_141b8e93-a0ab-4dd6-bf05-5e3a8efa88f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2025SubscriptionAgreementMember_019b02ad-cca4-7ee9-9cd6-d8b49c929898" xlink:href="lcid-20251231.xsd#lcid_A2025SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_917d329c-56d7-4c7e-a36d-473404da434d" xlink:to="loc_lcid_A2025SubscriptionAgreementMember_019b02ad-cca4-7ee9-9cd6-d8b49c929898" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_f26a50b3-3218-417d-b9cb-17fc0b41c38e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInTemporaryEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6fe6e889-bbd5-4d02-9cd8-8d0e36664f50" xlink:to="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_f26a50b3-3218-417d-b9cb-17fc0b41c38e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_4d90bc65-b0ed-4850-82ef-12b8fc309213" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_f26a50b3-3218-417d-b9cb-17fc0b41c38e" xlink:to="loc_us-gaap_TemporaryEquitySharesOutstanding_4d90bc65-b0ed-4850-82ef-12b8fc309213" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_e42bcade-ea15-4899-8ca4-d8ae0d032576" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_f26a50b3-3218-417d-b9cb-17fc0b41c38e" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_e42bcade-ea15-4899-8ca4-d8ae0d032576" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_aa1e9cc6-b0b7-4784-bdaa-50bb9193ed68" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_f26a50b3-3218-417d-b9cb-17fc0b41c38e" xlink:to="loc_lcid_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_aa1e9cc6-b0b7-4784-bdaa-50bb9193ed68" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_4d89812f-04b4-46cb-9715-128665e3a673" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_f26a50b3-3218-417d-b9cb-17fc0b41c38e" xlink:to="loc_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_4d89812f-04b4-46cb-9715-128665e3a673" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityAccretionNet_5ac91996-9021-42d0-841a-c6d62667af1a" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityAccretionNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_f26a50b3-3218-417d-b9cb-17fc0b41c38e" xlink:to="loc_lcid_TemporaryEquityAccretionNet_5ac91996-9021-42d0-841a-c6d62667af1a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_5606983c-032c-4980-bbfb-d05c3e46d4de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_766c8516-54f7-4541-aea4-07169ab3cfcf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_6fe6e889-bbd5-4d02-9cd8-8d0e36664f50" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_bcdcb3a5-2dec-4549-bc58-4e69aab08de5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_bcdcb3a5-2dec-4549-bc58-4e69aab08de5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_2a61d4a9-285e-41a6-aaf8-a56b0ef7c193" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_StockholdersEquity_2a61d4a9-285e-41a6-aaf8-a56b0ef7c193" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_d84abf24-b746-47a4-9c76-628a46ea9fb6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_NetIncomeLoss_d84abf24-b746-47a4-9c76-628a46ea9fb6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_d2183646-ee72-430f-a834-0a35d1950c2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_d2183646-ee72-430f-a834-0a35d1950c2c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_b450356f-4ec4-4e2f-b4b0-135313d3d376" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_b450356f-4ec4-4e2f-b4b0-135313d3d376" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_84e5207b-705a-4e48-abe3-af3ad411d11f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures_84e5207b-705a-4e48-abe3-af3ad411d11f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_3e4b9ef5-e974-4985-96d5-a588fc78ddbc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures_3e4b9ef5-e974-4985-96d5-a588fc78ddbc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_47268c9b-4c08-40bc-bca0-6ce990463d9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_47268c9b-4c08-40bc-bca0-6ce990463d9c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_b25913a5-9aa1-43fc-9eba-6d65cd21111b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_b25913a5-9aa1-43fc-9eba-6d65cd21111b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_c066e382-499d-46b5-a7cb-12d45d3b436d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_c066e382-499d-46b5-a7cb-12d45d3b436d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_5dfe4499-8d19-4cfd-af9f-ca0446c77fc9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_5dfe4499-8d19-4cfd-af9f-ca0446c77fc9" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_3d1d647a-9fc5-4fa3-a79b-4f9a0722de0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_3d1d647a-9fc5-4fa3-a79b-4f9a0722de0a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_2b750e43-faa7-45bf-8f8b-73b61ac2314b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_2b750e43-faa7-45bf-8f8b-73b61ac2314b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions_019b02ad-cca4-7477-8d75-f3c25acdf13a" xlink:href="lcid-20251231.xsd#lcid_AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_lcid_AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions_019b02ad-cca4-7477-8d75-f3c25acdf13a" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PreferredStockAccretionNet_5ab8067e-01bb-4637-92e3-f28b708f731b" xlink:href="lcid-20251231.xsd#lcid_PreferredStockAccretionNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_lcid_PreferredStockAccretionNet_5ab8067e-01bb-4637-92e3-f28b708f731b" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_1d6e13be-7b84-4cd5-85aa-8dad0170b655" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_989e9ae4-8fab-400f-a308-b9fa6b419277" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_1d6e13be-7b84-4cd5-85aa-8dad0170b655" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_590e1a23-2d52-4328-890a-0eee068d7d8a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_73684a3a-10d5-4161-b597-f0df96e4bc42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="lcid-20251231.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_85bbce45-ead3-4574-a8a7-32419d165d94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_4a51c870-ff4c-4c65-ada4-2e2841c29836" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_85bbce45-ead3-4574-a8a7-32419d165d94" xlink:to="loc_us-gaap_StatementTable_4a51c870-ff4c-4c65-ada4-2e2841c29836" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_c3d601ad-f1e7-40d1-b2b8-4f317b023f5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_4a51c870-ff4c-4c65-ada4-2e2841c29836" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_c3d601ad-f1e7-40d1-b2b8-4f317b023f5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_c3d601ad-f1e7-40d1-b2b8-4f317b023f5d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_c3d601ad-f1e7-40d1-b2b8-4f317b023f5d" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_c3d601ad-f1e7-40d1-b2b8-4f317b023f5d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_14020b29-844e-4d71-be82-0810575b15a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_c3d601ad-f1e7-40d1-b2b8-4f317b023f5d" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_14020b29-844e-4d71-be82-0810575b15a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_CommonStockWarrantLiabilityMember_74bf94a5-1cba-4d46-bdae-7c09dcfbde41" xlink:href="lcid-20251231.xsd#lcid_CommonStockWarrantLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_14020b29-844e-4d71-be82-0810575b15a2" xlink:to="loc_lcid_CommonStockWarrantLiabilityMember_74bf94a5-1cba-4d46-bdae-7c09dcfbde41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_86bf90c4-09dd-4c14-b86c-2e96b8439812" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_4a51c870-ff4c-4c65-ada4-2e2841c29836" xlink:to="loc_us-gaap_StatementClassOfStockAxis_86bf90c4-09dd-4c14-b86c-2e96b8439812" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_86bf90c4-09dd-4c14-b86c-2e96b8439812_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_86bf90c4-09dd-4c14-b86c-2e96b8439812" xlink:to="loc_us-gaap_ClassOfStockDomain_86bf90c4-09dd-4c14-b86c-2e96b8439812_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_e5d44295-c413-4538-abd4-88155a6cda51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_86bf90c4-09dd-4c14-b86c-2e96b8439812" xlink:to="loc_us-gaap_ClassOfStockDomain_e5d44295-c413-4538-abd4-88155a6cda51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_d6dc7051-03c4-419d-a0c9-1dd7c05a94be" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_e5d44295-c413-4538-abd4-88155a6cda51" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_d6dc7051-03c4-419d-a0c9-1dd7c05a94be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_fd7959bf-61cf-4607-af3d-d623d048c19a" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_e5d44295-c413-4538-abd4-88155a6cda51" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_fd7959bf-61cf-4607-af3d-d623d048c19a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_abe7a425-3f17-49f8-87a4-76ba8f2c3fac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_4a51c870-ff4c-4c65-ada4-2e2841c29836" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_abe7a425-3f17-49f8-87a4-76ba8f2c3fac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_abe7a425-3f17-49f8-87a4-76ba8f2c3fac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_abe7a425-3f17-49f8-87a4-76ba8f2c3fac" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_abe7a425-3f17-49f8-87a4-76ba8f2c3fac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_b1cb3704-43a4-41a9-840a-854428f91783" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_abe7a425-3f17-49f8-87a4-76ba8f2c3fac" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_b1cb3704-43a4-41a9-840a-854428f91783" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2025SubscriptionAgreementMember_019b02f6-b437-72bf-bfa9-4dcfe1f2915e" xlink:href="lcid-20251231.xsd#lcid_A2025SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_b1cb3704-43a4-41a9-840a-854428f91783" xlink:to="loc_lcid_A2025SubscriptionAgreementMember_019b02f6-b437-72bf-bfa9-4dcfe1f2915e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024UnderwritingAgreementMember_ea4e6468-63a2-4468-9e35-8c0651ea8b8e" xlink:href="lcid-20251231.xsd#lcid_A2024UnderwritingAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_b1cb3704-43a4-41a9-840a-854428f91783" xlink:to="loc_lcid_A2024UnderwritingAgreementMember_ea4e6468-63a2-4468-9e35-8c0651ea8b8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024SubscriptionAgreementMember_52a787ea-5406-49f2-8810-06a0c652c0c1" xlink:href="lcid-20251231.xsd#lcid_A2024SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_b1cb3704-43a4-41a9-840a-854428f91783" xlink:to="loc_lcid_A2024SubscriptionAgreementMember_52a787ea-5406-49f2-8810-06a0c652c0c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023UnderwritingAgreementMember_bbf4e116-9f12-4c1b-a0e3-d49c8a1c842c" xlink:href="lcid-20251231.xsd#lcid_A2023UnderwritingAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_b1cb3704-43a4-41a9-840a-854428f91783" xlink:to="loc_lcid_A2023UnderwritingAgreementMember_bbf4e116-9f12-4c1b-a0e3-d49c8a1c842c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023SubscriptionAgreementMember_a8b51d8c-47cd-4974-8d1a-2123e8aced3f" xlink:href="lcid-20251231.xsd#lcid_A2023SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_b1cb3704-43a4-41a9-840a-854428f91783" xlink:to="loc_lcid_A2023SubscriptionAgreementMember_a8b51d8c-47cd-4974-8d1a-2123e8aced3f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b02f4-1951-798a-a5fa-77dfe42b24e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_4a51c870-ff4c-4c65-ada4-2e2841c29836" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b02f4-1951-798a-a5fa-77dfe42b24e0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b02f4-1951-798a-a5fa-77dfe42b24e0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b02f4-1951-798a-a5fa-77dfe42b24e0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b02f4-1951-798a-a5fa-77dfe42b24e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b02f4-1951-7dd4-bdad-452608eb4f26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b02f4-1951-798a-a5fa-77dfe42b24e0" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b02f4-1951-7dd4-bdad-452608eb4f26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2031NotesMember_019b02f4-a585-7326-aa1c-d6b81f56bb3b" xlink:href="lcid-20251231.xsd#lcid_A2031NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b02f4-1951-7dd4-bdad-452608eb4f26" xlink:to="loc_lcid_A2031NotesMember_019b02f4-a585-7326-aa1c-d6b81f56bb3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2030NotesMember_019b02f4-1951-7bd6-a699-8d285710a726" xlink:href="lcid-20251231.xsd#lcid_A2030NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b02f4-1951-7dd4-bdad-452608eb4f26" xlink:to="loc_lcid_A2030NotesMember_019b02f4-1951-7bd6-a699-8d285710a726" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_89ff930e-59af-4fb1-9ab9-a9c821109694" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_85bbce45-ead3-4574-a8a7-32419d165d94" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_89ff930e-59af-4fb1-9ab9-a9c821109694" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_e9db097e-f7c4-4e5b-9d42-9a2bfc8cc36d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_89ff930e-59af-4fb1-9ab9-a9c821109694" xlink:to="loc_us-gaap_NetIncomeLoss_e9db097e-f7c4-4e5b-9d42-9a2bfc8cc36d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_89ff930e-59af-4fb1-9ab9-a9c821109694" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DepreciationAndAmortizationExcludingDebtDiscountsAndInsurancePremiums_e98a8f54-f66e-4749-8b0b-660bef3efcf5" xlink:href="lcid-20251231.xsd#lcid_DepreciationAndAmortizationExcludingDebtDiscountsAndInsurancePremiums"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_lcid_DepreciationAndAmortizationExcludingDebtDiscountsAndInsurancePremiums_e98a8f54-f66e-4749-8b0b-660bef3efcf5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AmortizationOfInsurancePremiums_9bfbf9dc-f24c-4d91-9981-7a7fff7c2241" xlink:href="lcid-20251231.xsd#lcid_AmortizationOfInsurancePremiums"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_lcid_AmortizationOfInsurancePremiums_9bfbf9dc-f24c-4d91-9981-7a7fff7c2241" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_225c2a73-9f28-4d05-8d57-43ee0ad0db9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_225c2a73-9f28-4d05-8d57-43ee0ad0db9a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_578b3034-0acd-48bc-a010-d5ef2116c1d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_us-gaap_ShareBasedCompensation_578b3034-0acd-48bc-a010-d5ef2116c1d9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_InventoryAndPurchaseObligationWriteDownNoncash_735f4a59-8d28-435b-8493-65422f10c7c8" xlink:href="lcid-20251231.xsd#lcid_InventoryAndPurchaseObligationWriteDownNoncash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_lcid_InventoryAndPurchaseObligationWriteDownNoncash_735f4a59-8d28-435b-8493-65422f10c7c8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAdjustmentOfWarrants_e647c81c-9963-4922-8af3-ad29a9d95976" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAdjustmentOfWarrants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_us-gaap_FairValueAdjustmentOfWarrants_e647c81c-9963-4922-8af3-ad29a9d95976" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_abd13af1-9c44-4f0e-9ed3-814a356cd890" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_abd13af1-9c44-4f0e-9ed3-814a356cd890" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_895895fe-f6d2-4efd-9265-c7058c250fca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_895895fe-f6d2-4efd-9265-c7058c250fca" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_fb3a6ee9-51fe-496a-8cbb-5de28fbc2b3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_fb3a6ee9-51fe-496a-8cbb-5de28fbc2b3a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019b02e7-8787-7616-b30b-f8329a3d1870" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019b02e7-8787-7616-b30b-f8329a3d1870" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_06476251-59e0-4f71-8343-d235ad1f1dbe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b3525ac4-1fd8-4f5f-87b2-8770b7c54ad4" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_06476251-59e0-4f71-8343-d235ad1f1dbe" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_6de06722-0f74-4a70-b6c8-7314e8fd2955" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_89ff930e-59af-4fb1-9ab9-a9c821109694" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_6de06722-0f74-4a70-b6c8-7314e8fd2955" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_8ece1fb4-4fde-4572-b2da-b5bd63775ca8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_6de06722-0f74-4a70-b6c8-7314e8fd2955" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_8ece1fb4-4fde-4572-b2da-b5bd63775ca8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_3842ad8c-f9b2-4d97-9429-a4288cfb8ba8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_6de06722-0f74-4a70-b6c8-7314e8fd2955" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_3842ad8c-f9b2-4d97-9429-a4288cfb8ba8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_b815058b-ecc0-4a09-b291-6ff84777adf5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_6de06722-0f74-4a70-b6c8-7314e8fd2955" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidExpense_b815058b-ecc0-4a09-b291-6ff84777adf5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_019b0389-7e1e-77ec-958b-57061e86c514" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_6de06722-0f74-4a70-b6c8-7314e8fd2955" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_019b0389-7e1e-77ec-958b-57061e86c514" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_f938a9d8-b8b6-4503-acc1-050e2f52b36d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_6de06722-0f74-4a70-b6c8-7314e8fd2955" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_f938a9d8-b8b6-4503-acc1-050e2f52b36d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019b02e9-b572-7bf6-b985-3ebb80837628" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_6de06722-0f74-4a70-b6c8-7314e8fd2955" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019b02e9-b572-7bf6-b985-3ebb80837628" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1f01f0b4-38e8-482b-a6d0-2def6490797e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_89ff930e-59af-4fb1-9ab9-a9c821109694" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1f01f0b4-38e8-482b-a6d0-2def6490797e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8adca203-4066-4c3d-99c4-37d96f24d551" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_85bbce45-ead3-4574-a8a7-32419d165d94" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8adca203-4066-4c3d-99c4-37d96f24d551" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_27d69474-1c37-41fb-a386-00b509c2883b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8adca203-4066-4c3d-99c4-37d96f24d551" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_27d69474-1c37-41fb-a386-00b509c2883b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_11e57619-f662-49ea-a089-700b21f8af5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8adca203-4066-4c3d-99c4-37d96f24d551" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_11e57619-f662-49ea-a089-700b21f8af5a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_1c7bc2df-4202-49b6-82ba-f2c568b5c994" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8adca203-4066-4c3d-99c4-37d96f24d551" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_1c7bc2df-4202-49b6-82ba-f2c568b5c994" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_804b8ad0-bb77-45f4-a695-917c3c31fde0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8adca203-4066-4c3d-99c4-37d96f24d551" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_804b8ad0-bb77-45f4-a695-917c3c31fde0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ProceedsFromGovernmentGrant_8889beab-944b-47fc-8335-52c5cf2d0d0b" xlink:href="lcid-20251231.xsd#lcid_ProceedsFromGovernmentGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8adca203-4066-4c3d-99c4-37d96f24d551" xlink:to="loc_lcid_ProceedsFromGovernmentGrant_8889beab-944b-47fc-8335-52c5cf2d0d0b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_da6b807a-8be3-4060-a081-5ba6a6307ad6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8adca203-4066-4c3d-99c4-37d96f24d551" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_da6b807a-8be3-4060-a081-5ba6a6307ad6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_4ccce475-8b59-457d-b128-e896afe1ec84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_8adca203-4066-4c3d-99c4-37d96f24d551" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_4ccce475-8b59-457d-b128-e896afe1ec84" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_85bbce45-ead3-4574-a8a7-32419d165d94" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_afff5452-54fe-42a8-b026-f1e7b7beede0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock_afff5452-54fe-42a8-b026-f1e7b7beede0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfRedeemableConvertiblePreferredStock_019b0364-94a1-7a7c-b403-0863984b781d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRepurchaseOfRedeemableConvertiblePreferredStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfRedeemableConvertiblePreferredStock_019b0364-94a1-7a7c-b403-0863984b781d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_ca6211a9-2178-4337-a778-219656557280" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfCommonStock_ca6211a9-2178-4337-a778-219656557280" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019b02f6-530b-7e8d-8074-709679a15254" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019b02f6-530b-7e8d-8074-709679a15254" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019b02f2-9ee5-7baa-835d-050ab56b471e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019b02f2-9ee5-7baa-835d-050ab56b471e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_bcba6420-aa00-4b56-a241-cb708d961400" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_bcba6420-aa00-4b56-a241-cb708d961400" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PaymentForPurchasedCappedCallTransactions_019b02f0-755c-7707-ae8a-2511cd8fefe1" xlink:href="lcid-20251231.xsd#lcid_PaymentForPurchasedCappedCallTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_lcid_PaymentForPurchasedCappedCallTransactions_019b02f0-755c-7707-ae8a-2511cd8fefe1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfConvertibleDebt_019b02ef-9a4a-793e-ac57-e49e51b221ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_RepaymentsOfConvertibleDebt_019b02ef-9a4a-793e-ac57-e49e51b221ad" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRelatedPartyDebt_69da29d5-1483-46a1-9dd5-0388368c6713" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromRelatedPartyDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_ProceedsFromRelatedPartyDebt_69da29d5-1483-46a1-9dd5-0388368c6713" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfRelatedPartyDebt_e1d291f4-5581-4469-ae0c-14347ccc6481" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfRelatedPartyDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_RepaymentsOfRelatedPartyDebt_e1d291f4-5581-4469-ae0c-14347ccc6481" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_16e1f212-9961-417f-915c-365365962186" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_16e1f212-9961-417f-915c-365365962186" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockPlans_dba59634-1a53-4ea8-bbdd-3556f09f9821" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromStockPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_ProceedsFromStockPlans_dba59634-1a53-4ea8-bbdd-3556f09f9821" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_e9bd2466-4d87-428c-8073-72cc45310aca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_e9bd2466-4d87-428c-8073-72cc45310aca" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeasePrincipalPayments_50cdce3f-7408-47b9-bb6f-2a455cb87b9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeasePrincipalPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_FinanceLeasePrincipalPayments_50cdce3f-7408-47b9-bb6f-2a455cb87b9c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PaymentsForCreditFacilityIssuanceCosts_019c7658-9319-787c-8cf6-307fe8a8c605" xlink:href="lcid-20251231.xsd#lcid_PaymentsForCreditFacilityIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_lcid_PaymentsForCreditFacilityIssuanceCosts_019c7658-9319-787c-8cf6-307fe8a8c605" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b40ddb09-be11-4364-8a20-7a2118ea7bea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_f0ec0fb7-4594-4d64-a098-ef96c89dd8fc" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b40ddb09-be11-4364-8a20-7a2118ea7bea" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_c93b0327-e8f0-4f9a-99ae-4ddcb33ea347" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_85bbce45-ead3-4574-a8a7-32419d165d94" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_c93b0327-e8f0-4f9a-99ae-4ddcb33ea347" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0d4c22db-44c9-4f06-a63c-0889823ebecb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_85bbce45-ead3-4574-a8a7-32419d165d94" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0d4c22db-44c9-4f06-a63c-0889823ebecb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_a9ee864c-6ab7-42ee-94dd-9b5ba09401e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_9d133f3a-7f63-4f91-a2f2-3a9c5dcadf6a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SupplementalCashFlowInformationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_85bbce45-ead3-4574-a8a7-32419d165d94" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_9d133f3a-7f63-4f91-a2f2-3a9c5dcadf6a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet_84c0980b-ec6f-41da-a9e5-b08ac35abb66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_9d133f3a-7f63-4f91-a2f2-3a9c5dcadf6a" xlink:to="loc_us-gaap_InterestPaidNet_84c0980b-ec6f-41da-a9e5-b08ac35abb66" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_8683154d-acf7-4879-aafa-bddb3263dc59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_9d133f3a-7f63-4f91-a2f2-3a9c5dcadf6a" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_8683154d-acf7-4879-aafa-bddb3263dc59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_93c34305-b40d-4f3a-96f3-ec681c7e7df3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncashInvestingAndFinancingItemsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_85bbce45-ead3-4574-a8a7-32419d165d94" xlink:to="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_93c34305-b40d-4f3a-96f3-ec681c7e7df3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ChangeInCapitalExpendituresIncurredButNotYetPaid_5a2b8e65-8b64-4e2e-926e-2e086b18372c" xlink:href="lcid-20251231.xsd#lcid_ChangeInCapitalExpendituresIncurredButNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_93c34305-b40d-4f3a-96f3-ec681c7e7df3" xlink:to="loc_lcid_ChangeInCapitalExpendituresIncurredButNotYetPaid_5a2b8e65-8b64-4e2e-926e-2e086b18372c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ChangeInGovernmentGrantReflectedInPropertyPlantAndEquipment_c74b2343-9647-4092-9285-2dd2d7beabcb" xlink:href="lcid-20251231.xsd#lcid_ChangeInGovernmentGrantReflectedInPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_93c34305-b40d-4f3a-96f3-ec681c7e7df3" xlink:to="loc_lcid_ChangeInGovernmentGrantReflectedInPropertyPlantAndEquipment_c74b2343-9647-4092-9285-2dd2d7beabcb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RightOfUseAssetObtainedInExchangeForLeaseLiability_7eaa204a-18e8-44a9-93c6-97bc2ebf1feb" xlink:href="lcid-20251231.xsd#lcid_RightOfUseAssetObtainedInExchangeForLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_93c34305-b40d-4f3a-96f3-ec681c7e7df3" xlink:to="loc_lcid_RightOfUseAssetObtainedInExchangeForLeaseLiability_7eaa204a-18e8-44a9-93c6-97bc2ebf1feb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_EquitySecuritiesObtainedThroughArrangement_0f1ff7fc-4f84-4f40-a13e-490aa226dae4" xlink:href="lcid-20251231.xsd#lcid_EquitySecuritiesObtainedThroughArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NoncashInvestingAndFinancingItemsAbstract_93c34305-b40d-4f3a-96f3-ec681c7e7df3" xlink:to="loc_lcid_EquitySecuritiesObtainedThroughArrangement_0f1ff7fc-4f84-4f40-a13e-490aa226dae4" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" xlink:type="simple" xlink:href="lcid-20251231.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_38cf4184-8c07-4998-9848-14bac244cebe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_0f288f6d-1bfb-4ec9-b3ec-ae53a579ff0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_38cf4184-8c07-4998-9848-14bac244cebe" xlink:to="loc_us-gaap_StatementTable_0f288f6d-1bfb-4ec9-b3ec-ae53a579ff0a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_99c7baab-e6bb-4516-b98c-b96522e454f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_0f288f6d-1bfb-4ec9-b3ec-ae53a579ff0a" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_99c7baab-e6bb-4516-b98c-b96522e454f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_99c7baab-e6bb-4516-b98c-b96522e454f1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_99c7baab-e6bb-4516-b98c-b96522e454f1" xlink:to="loc_us-gaap_RelatedPartyDomain_99c7baab-e6bb-4516-b98c-b96522e454f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_c440d3cc-de72-423a-923d-92d79ed81ab7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_99c7baab-e6bb-4516-b98c-b96522e454f1" xlink:to="loc_us-gaap_RelatedPartyDomain_c440d3cc-de72-423a-923d-92d79ed81ab7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_9553fa92-9087-41a2-a74b-fc8f1da1642f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_c440d3cc-de72-423a-923d-92d79ed81ab7" xlink:to="loc_us-gaap_RelatedPartyMember_9553fa92-9087-41a2-a74b-fc8f1da1642f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_61fccff8-1a4f-42de-ba49-e75b247b7be7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_38cf4184-8c07-4998-9848-14bac244cebe" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_61fccff8-1a4f-42de-ba49-e75b247b7be7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019b02d2-6381-7938-a840-adfd7f017c75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_38cf4184-8c07-4998-9848-14bac244cebe" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_019b02d2-6381-7938-a840-adfd7f017c75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_42b79d56-6d37-44e7-87e6-778d8789a2e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_38cf4184-8c07-4998-9848-14bac244cebe" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_42b79d56-6d37-44e7-87e6-778d8789a2e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_33f30c32-ee20-4e85-a82d-835edd84b29e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_38cf4184-8c07-4998-9848-14bac244cebe" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_33f30c32-ee20-4e85-a82d-835edd84b29e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_019b037b-7b5b-717e-9f49-b91d1c46311e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_38cf4184-8c07-4998-9848-14bac244cebe" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities_019b037b-7b5b-717e-9f49-b91d1c46311e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PaymentsForCreditFacilityIssuanceCosts_019c7657-de97-76dc-9b40-05731403f93c" xlink:href="lcid-20251231.xsd#lcid_PaymentsForCreditFacilityIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_38cf4184-8c07-4998-9848-14bac244cebe" xlink:to="loc_lcid_PaymentsForCreditFacilityIssuanceCosts_019c7657-de97-76dc-9b40-05731403f93c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ChangeInCapitalExpendituresIncurredButNotYetPaid_71a9b3c8-495f-4c63-b019-2a4bda7fe132" xlink:href="lcid-20251231.xsd#lcid_ChangeInCapitalExpendituresIncurredButNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_38cf4184-8c07-4998-9848-14bac244cebe" xlink:to="loc_lcid_ChangeInCapitalExpendituresIncurredButNotYetPaid_71a9b3c8-495f-4c63-b019-2a4bda7fe132" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DESCRIPTIONOFBUSINESSDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DESCRIPTIONOFBUSINESSDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DESCRIPTIONOFBUSINESSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_6a4d03d4-3947-405e-8b1d-bfe95d4e644f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_us-gaap_DebtInstrumentTable_6a4d03d4-3947-405e-8b1d-bfe95d4e644f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b1312-1eac-7879-a6d1-0ec233f54bb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6a4d03d4-3947-405e-8b1d-bfe95d4e644f" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b1312-1eac-7879-a6d1-0ec233f54bb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7879-a6d1-0ec233f54bb4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b1312-1eac-7879-a6d1-0ec233f54bb4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7879-a6d1-0ec233f54bb4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b1312-1eac-7879-a6d1-0ec233f54bb4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaudiIndustrialDevelopmentFundLoanAgreementMember_019b1312-1eac-75ab-a490-3b730b319a1b" xlink:href="lcid-20251231.xsd#lcid_SaudiIndustrialDevelopmentFundLoanAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_SaudiIndustrialDevelopmentFundLoanAgreementMember_019b1312-1eac-75ab-a490-3b730b319a1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ABLCreditFacilityMember_019b1312-1eac-7d37-8e9c-c744684c75c2" xlink:href="lcid-20251231.xsd#lcid_ABLCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_ABLCreditFacilityMember_019b1312-1eac-7d37-8e9c-c744684c75c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_GIBFacilityAgreementMember_019b1312-1eac-7e81-9216-0b362139c8c1" xlink:href="lcid-20251231.xsd#lcid_GIBFacilityAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_GIBFacilityAgreementMember_019b1312-1eac-7e81-9216-0b362139c8c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023GIBCreditFacilityMember_019b1313-2b37-7ba7-b4c5-b29dc4aad8c6" xlink:href="lcid-20251231.xsd#lcid_A2023GIBCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_A2023GIBCreditFacilityMember_019b1313-2b37-7ba7-b4c5-b29dc4aad8c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2025GIBCreditFacilityMember_019b1313-2b37-7b0e-ac54-f2ac387e0fef" xlink:href="lcid-20251231.xsd#lcid_A2025GIBCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_A2025GIBCreditFacilityMember_019b1313-2b37-7b0e-ac54-f2ac387e0fef" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DDTLCreditFacilityMember_019b1314-6713-7454-9e68-cd82159db36d" xlink:href="lcid-20251231.xsd#lcid_DDTLCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_DDTLCreditFacilityMember_019b1314-6713-7454-9e68-cd82159db36d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2025DDTLCreditFacilityMember_019b1314-6713-7387-b5de-2423ee815763" xlink:href="lcid-20251231.xsd#lcid_A2025DDTLCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_A2025DDTLCreditFacilityMember_019b1314-6713-7387-b5de-2423ee815763" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2030NotesMember_019b1315-0e71-755e-aff3-b33f71d5f849" xlink:href="lcid-20251231.xsd#lcid_A2030NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_A2030NotesMember_019b1315-0e71-755e-aff3-b33f71d5f849" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2026NotesMember_019b1315-6f96-7faa-b6ea-3ee7f6a1e1dd" xlink:href="lcid-20251231.xsd#lcid_A2026NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_A2026NotesMember_019b1315-6f96-7faa-b6ea-3ee7f6a1e1dd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2031NotesMember_019b1315-6f96-7036-9cdc-7966603d1312" xlink:href="lcid-20251231.xsd#lcid_A2031NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_A2031NotesMember_019b1315-6f96-7036-9cdc-7966603d1312" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ConvertibleSeniorNotesDue2031Member_019b1315-6f96-7c67-89ac-86c4b584787f" xlink:href="lcid-20251231.xsd#lcid_ConvertibleSeniorNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1312-1eac-7fab-ab04-fdaa55e3ff80" xlink:to="loc_lcid_ConvertibleSeniorNotesDue2031Member_019b1315-6f96-7c67-89ac-86c4b584787f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019b1312-1eac-7be9-ba53-3ac73a5989c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6a4d03d4-3947-405e-8b1d-bfe95d4e644f" xlink:to="loc_us-gaap_CreditFacilityAxis_019b1312-1eac-7be9-ba53-3ac73a5989c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019b1312-1eac-7be9-ba53-3ac73a5989c2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019b1312-1eac-7be9-ba53-3ac73a5989c2" xlink:to="loc_us-gaap_CreditFacilityDomain_019b1312-1eac-7be9-ba53-3ac73a5989c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019b1312-1eac-71c6-8e97-2d7dc26e27c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019b1312-1eac-7be9-ba53-3ac73a5989c2" xlink:to="loc_us-gaap_CreditFacilityDomain_019b1312-1eac-71c6-8e97-2d7dc26e27c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019b1312-1eac-7c7d-bcbf-b7a780be6893" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019b1312-1eac-71c6-8e97-2d7dc26e27c6" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019b1312-1eac-7c7d-bcbf-b7a780be6893" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019b1314-6713-7581-826e-f2ce5711fea0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019b1312-1eac-71c6-8e97-2d7dc26e27c6" xlink:to="loc_us-gaap_SecuredDebtMember_019b1314-6713-7581-826e-f2ce5711fea0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019b1312-1eac-76f7-a6ee-53db236d16f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6a4d03d4-3947-405e-8b1d-bfe95d4e644f" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019b1312-1eac-76f7-a6ee-53db236d16f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b1312-1eac-76f7-a6ee-53db236d16f6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b1312-1eac-76f7-a6ee-53db236d16f6" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b1312-1eac-76f7-a6ee-53db236d16f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b1312-1eac-7cca-b9d4-3d3de5974453" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b1312-1eac-76f7-a6ee-53db236d16f6" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b1312-1eac-7cca-b9d4-3d3de5974453" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019b1312-1eac-7343-9c00-d14350356c61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b1312-1eac-7cca-b9d4-3d3de5974453" xlink:to="loc_us-gaap_LineOfCreditMember_019b1312-1eac-7343-9c00-d14350356c61" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DelayedDrawTermLoanMember_019b1314-6713-7bb8-9669-7bb76d3c4994" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DelayedDrawTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b1312-1eac-7cca-b9d4-3d3de5974453" xlink:to="loc_us-gaap_DelayedDrawTermLoanMember_019b1314-6713-7bb8-9669-7bb76d3c4994" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019b1315-0e71-7c11-9497-8ec7e48732e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b1312-1eac-7cca-b9d4-3d3de5974453" xlink:to="loc_us-gaap_ConvertibleDebtMember_019b1315-0e71-7c11-9497-8ec7e48732e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019b1313-7394-74ee-bf19-e41485e40cf5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6a4d03d4-3947-405e-8b1d-bfe95d4e644f" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019b1313-7394-74ee-bf19-e41485e40cf5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-74ee-bf19-e41485e40cf5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019b1313-7394-74ee-bf19-e41485e40cf5" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-74ee-bf19-e41485e40cf5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-7f1f-8728-6bf960858fc3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019b1313-7394-74ee-bf19-e41485e40cf5" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-7f1f-8728-6bf960858fc3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023UnderwritingAgreementMember_019b1313-7394-7108-8eb0-188539c1c852" xlink:href="lcid-20251231.xsd#lcid_A2023UnderwritingAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-7f1f-8728-6bf960858fc3" xlink:to="loc_lcid_A2023UnderwritingAgreementMember_019b1313-7394-7108-8eb0-188539c1c852" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023SubscriptionAgreementMember_019b1313-7394-7615-b5dd-ace6152fd598" xlink:href="lcid-20251231.xsd#lcid_A2023SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-7f1f-8728-6bf960858fc3" xlink:to="loc_lcid_A2023SubscriptionAgreementMember_019b1313-7394-7615-b5dd-ace6152fd598" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_019b1313-c7f1-7ce9-b6e8-62f31b926c6e" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-7f1f-8728-6bf960858fc3" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_019b1313-c7f1-7ce9-b6e8-62f31b926c6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_019b1313-c7f1-79b8-81f9-2b89439b9abf" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-7f1f-8728-6bf960858fc3" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_019b1313-c7f1-79b8-81f9-2b89439b9abf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024UnderwritingAgreementMember_019b1314-8c10-7efd-8d99-61a375fd2fbc" xlink:href="lcid-20251231.xsd#lcid_A2024UnderwritingAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-7f1f-8728-6bf960858fc3" xlink:to="loc_lcid_A2024UnderwritingAgreementMember_019b1314-8c10-7efd-8d99-61a375fd2fbc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024SubscriptionAgreementMember_019b1314-8c10-7cd0-a834-83fbcc1d9d6c" xlink:href="lcid-20251231.xsd#lcid_A2024SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-7f1f-8728-6bf960858fc3" xlink:to="loc_lcid_A2024SubscriptionAgreementMember_019b1314-8c10-7cd0-a834-83fbcc1d9d6c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2025SubscriptionAgreementMember_019b1315-0e71-78ff-b216-8be6b4a63cfe" xlink:href="lcid-20251231.xsd#lcid_A2025SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b1313-7394-7f1f-8728-6bf960858fc3" xlink:to="loc_lcid_A2025SubscriptionAgreementMember_019b1315-0e71-78ff-b216-8be6b4a63cfe" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019b1313-7394-776f-9769-f9a0258b25c3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6a4d03d4-3947-405e-8b1d-bfe95d4e644f" xlink:to="loc_srt_CounterpartyNameAxis_019b1313-7394-776f-9769-f9a0258b25c3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1313-7394-776f-9769-f9a0258b25c3_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019b1313-7394-776f-9769-f9a0258b25c3" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1313-7394-776f-9769-f9a0258b25c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1313-7394-7d9c-8a91-123746b82a27" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019b1313-7394-776f-9769-f9a0258b25c3" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1313-7394-7d9c-8a91-123746b82a27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AyarThirdInvestmentCompanyMember_019b1313-7394-715d-a406-06488af96ba6" xlink:href="lcid-20251231.xsd#lcid_AyarThirdInvestmentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1313-7394-7d9c-8a91-123746b82a27" xlink:to="loc_lcid_AyarThirdInvestmentCompanyMember_019b1313-7394-715d-a406-06488af96ba6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SMBMember_019b1315-0e71-734f-9541-60b3801852c9" xlink:href="lcid-20251231.xsd#lcid_SMBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1313-7394-7d9c-8a91-123746b82a27" xlink:to="loc_lcid_SMBMember_019b1315-0e71-734f-9541-60b3801852c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TheUnderwriterMember_019c3861-4ac0-7c64-9e72-afd0d92e15a6" xlink:href="lcid-20251231.xsd#lcid_TheUnderwriterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1313-7394-7d9c-8a91-123746b82a27" xlink:to="loc_lcid_TheUnderwriterMember_019c3861-4ac0-7c64-9e72-afd0d92e15a6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b1313-c7f1-73df-89d3-4d9b1375b8db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6a4d03d4-3947-405e-8b1d-bfe95d4e644f" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b1313-c7f1-73df-89d3-4d9b1375b8db" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019b1313-c7f1-73df-89d3-4d9b1375b8db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b1313-c7f1-73df-89d3-4d9b1375b8db" xlink:to="loc_us-gaap_RelatedPartyDomain_019b1313-c7f1-73df-89d3-4d9b1375b8db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019b1313-c7f1-7814-bd3f-1155b476ad90" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b1313-c7f1-73df-89d3-4d9b1375b8db" xlink:to="loc_us-gaap_RelatedPartyDomain_019b1313-c7f1-7814-bd3f-1155b476ad90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019b1313-c7f1-77e3-a32a-1c1f09f2e551" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019b1313-c7f1-7814-bd3f-1155b476ad90" xlink:to="loc_us-gaap_RelatedPartyMember_019b1313-c7f1-77e3-a32a-1c1f09f2e551" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019b1313-c7f1-73e1-980f-c55b58e70718" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6a4d03d4-3947-405e-8b1d-bfe95d4e644f" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019b1313-c7f1-73e1-980f-c55b58e70718" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019b1313-c7f1-73e1-980f-c55b58e70718_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019b1313-c7f1-73e1-980f-c55b58e70718" xlink:to="loc_us-gaap_ClassOfStockDomain_019b1313-c7f1-73e1-980f-c55b58e70718_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019b1313-c7f1-75b1-9144-f7662185e43f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019b1313-c7f1-73e1-980f-c55b58e70718" xlink:to="loc_us-gaap_ClassOfStockDomain_019b1313-c7f1-75b1-9144-f7662185e43f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_019b1313-c7f1-7a37-923f-066049d1e4c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019b1313-c7f1-75b1-9144-f7662185e43f" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_019b1313-c7f1-7a37-923f-066049d1e4c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_019b1315-6f96-7f0f-97b3-ae0d6040b011" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OptionIndexedToIssuersEquityEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6a4d03d4-3947-405e-8b1d-bfe95d4e644f" xlink:to="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_019b1315-6f96-7f0f-97b3-ae0d6040b011" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_019b1315-6f96-7f0f-97b3-ae0d6040b011_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OptionIndexedToIssuersEquityTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_019b1315-6f96-7f0f-97b3-ae0d6040b011" xlink:to="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_019b1315-6f96-7f0f-97b3-ae0d6040b011_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_019b1315-6f96-7889-b880-714fc76b8b25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OptionIndexedToIssuersEquityTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_019b1315-6f96-7f0f-97b3-ae0d6040b011" xlink:to="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_019b1315-6f96-7889-b880-714fc76b8b25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CallOptionMember_019b1315-6f96-7669-855e-f864fea56fae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CallOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_019b1315-6f96-7889-b880-714fc76b8b25" xlink:to="loc_us-gaap_CallOptionMember_019b1315-6f96-7669-855e-f864fea56fae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019b1311-a257-75c3-86dd-ddcb7511bc24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_us-gaap_NetIncomeLoss_019b1311-a257-75c3-86dd-ddcb7511bc24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019b1311-a257-7fc2-8319-b05d94e01d8a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019b1311-a257-7fc2-8319-b05d94e01d8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019b1312-1eac-7ee9-8edc-fc6277ec1511" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019b1312-1eac-7ee9-8edc-fc6277ec1511" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019b1312-1eac-7cda-9237-17b69a164e21" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019b1312-1eac-7cda-9237-17b69a164e21" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockUnderwriterExercisePeriod_019c3861-4ac0-71ec-802a-29c03363e7c6" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockUnderwriterExercisePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_lcid_SaleOfStockUnderwriterExercisePeriod_019c3861-4ac0-71ec-802a-29c03363e7c6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LineOfCreditFacilityNumberOfFacilities_019b9a8d-8a09-7b6e-8e53-4e20e4e4fda0" xlink:href="lcid-20251231.xsd#lcid_LineOfCreditFacilityNumberOfFacilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_lcid_LineOfCreditFacilityNumberOfFacilities_019b9a8d-8a09-7b6e-8e53-4e20e4e4fda0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockConsiderationToReceiveOnTransaction_019b1313-7394-71ee-8f51-73f6da7ec50f" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockConsiderationToReceiveOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_lcid_SaleOfStockConsiderationToReceiveOnTransaction_019b1313-7394-71ee-8f51-73f6da7ec50f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019b1313-7394-7f82-bbb5-059f781057b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019b1313-7394-7f82-bbb5-059f781057b5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019b1313-c7f1-77e1-b488-e0663837fc1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019b1313-c7f1-77e1-b488-e0663837fc1d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019b1314-6713-7180-959c-410fc4c461da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_us-gaap_DebtInstrumentTerm_019b1314-6713-7180-959c-410fc4c461da" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockArithmeticAverageDailyVolumeWeightedAveragePriceOfCommonStockConsecutiveTradingDays_019b1315-0e71-776b-8e78-9f2493cf0f28" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockArithmeticAverageDailyVolumeWeightedAveragePriceOfCommonStockConsecutiveTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_lcid_SaleOfStockArithmeticAverageDailyVolumeWeightedAveragePriceOfCommonStockConsecutiveTradingDays_019b1315-0e71-776b-8e78-9f2493cf0f28" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019b1315-6f96-7a5d-8821-d2f5882d03bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019b1315-6f96-7a5d-8821-d2f5882d03bb" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PaymentForPurchasedCappedCallTransactions_019b1315-6f96-7704-bdfa-717e0097f3fb" xlink:href="lcid-20251231.xsd#lcid_PaymentForPurchasedCappedCallTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_lcid_PaymentForPurchasedCappedCallTransactions_019b1315-6f96-7704-bdfa-717e0097f3fb" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_019b1315-6f96-7959-b3ad-ffcad8af2320" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRepurchasedFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_019b1315-6f96-7959-b3ad-ffcad8af2320" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ProceedsFromConvertibleDebtUsedForRepurchase_019b1315-6f96-7048-8645-1741b74b69ed" xlink:href="lcid-20251231.xsd#lcid_ProceedsFromConvertibleDebtUsedForRepurchase"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1311-a257-721f-855a-44957c60d6e8" xlink:to="loc_lcid_ProceedsFromConvertibleDebtUsedForRepurchase_019b1315-6f96-7048-8645-1741b74b69ed" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_528a2202-7e48-4fce-8baa-2362e700ae6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_528a2202-7e48-4fce-8baa-2362e700ae6c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019c7525-c68c-7824-8931-37bc2ee03e46" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_528a2202-7e48-4fce-8baa-2362e700ae6c" xlink:to="loc_srt_MajorCustomersAxis_019c7525-c68c-7824-8931-37bc2ee03e46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019c7525-c68c-7824-8931-37bc2ee03e46_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019c7525-c68c-7824-8931-37bc2ee03e46" xlink:to="loc_srt_NameOfMajorCustomerDomain_019c7525-c68c-7824-8931-37bc2ee03e46_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019c7525-c68c-7da6-a022-ad94cf4dd0f0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019c7525-c68c-7824-8931-37bc2ee03e46" xlink:to="loc_srt_NameOfMajorCustomerDomain_019c7525-c68c-7da6-a022-ad94cf4dd0f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_GovernmentOfSaudiArabiaMember_019c7525-c68c-74a4-a5b6-8b15f76e0000" xlink:href="lcid-20251231.xsd#lcid_GovernmentOfSaudiArabiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019c7525-c68c-7da6-a022-ad94cf4dd0f0" xlink:to="loc_lcid_GovernmentOfSaudiArabiaMember_019c7525-c68c-74a4-a5b6-8b15f76e0000" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019c7525-c68c-78ae-b519-82b0b6fbb2ec" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_528a2202-7e48-4fce-8baa-2362e700ae6c" xlink:to="loc_srt_ProductOrServiceAxis_019c7525-c68c-78ae-b519-82b0b6fbb2ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c7525-c68c-78ae-b519-82b0b6fbb2ec_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019c7525-c68c-78ae-b519-82b0b6fbb2ec" xlink:to="loc_srt_ProductsAndServicesDomain_019c7525-c68c-78ae-b519-82b0b6fbb2ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c7525-c68c-763a-ab54-769fcbb33ae4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019c7525-c68c-78ae-b519-82b0b6fbb2ec" xlink:to="loc_srt_ProductsAndServicesDomain_019c7525-c68c-763a-ab54-769fcbb33ae4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ElectricVehiclePurchaseAgreementMember_019c7525-c68c-704a-b169-227f384e312f" xlink:href="lcid-20251231.xsd#lcid_ElectricVehiclePurchaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c7525-c68c-763a-ab54-769fcbb33ae4" xlink:to="loc_lcid_ElectricVehiclePurchaseAgreementMember_019c7525-c68c-704a-b169-227f384e312f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_VehicleSalesFromEVsMember_019c7526-460a-7f33-910c-b660494e2b59" xlink:href="lcid-20251231.xsd#lcid_VehicleSalesFromEVsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c7525-c68c-763a-ab54-769fcbb33ae4" xlink:to="loc_lcid_VehicleSalesFromEVsMember_019c7526-460a-7f33-910c-b660494e2b59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_VehicleSalesWithOTAMaintenanceServicesAndRemarketingMember_019c7526-460a-708e-90ba-14d7ab85b7db" xlink:href="lcid-20251231.xsd#lcid_VehicleSalesWithOTAMaintenanceServicesAndRemarketingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c7525-c68c-763a-ab54-769fcbb33ae4" xlink:to="loc_lcid_VehicleSalesWithOTAMaintenanceServicesAndRemarketingMember_019c7526-460a-708e-90ba-14d7ab85b7db" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_VehicleSalesWithRVGMember_019c7526-460a-7ed7-b5b3-ddc579dc40df" xlink:href="lcid-20251231.xsd#lcid_VehicleSalesWithRVGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c7525-c68c-763a-ab54-769fcbb33ae4" xlink:to="loc_lcid_VehicleSalesWithRVGMember_019c7526-460a-7ed7-b5b3-ddc579dc40df" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleAndLeasebackTransactionsMember_019c7527-286a-7fe4-8b4d-29d1ea58c5ec" xlink:href="lcid-20251231.xsd#lcid_SaleAndLeasebackTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c7525-c68c-763a-ab54-769fcbb33ae4" xlink:to="loc_lcid_SaleAndLeasebackTransactionsMember_019c7527-286a-7fe4-8b4d-29d1ea58c5ec" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RegulatoryCreditsMember_019c7527-286a-7a09-be31-b5af67046adc" xlink:href="lcid-20251231.xsd#lcid_RegulatoryCreditsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c7525-c68c-763a-ab54-769fcbb33ae4" xlink:to="loc_lcid_RegulatoryCreditsMember_019c7527-286a-7a09-be31-b5af67046adc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c7525-c68c-7da4-b8f5-f9415dc591b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_528a2202-7e48-4fce-8baa-2362e700ae6c" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c7525-c68c-7da4-b8f5-f9415dc591b1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c7525-c68c-7da4-b8f5-f9415dc591b1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c7525-c68c-7da4-b8f5-f9415dc591b1" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c7525-c68c-7da4-b8f5-f9415dc591b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c7525-c68c-733b-aabe-d3bfc1b1392d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c7525-c68c-7da4-b8f5-f9415dc591b1" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c7525-c68c-733b-aabe-d3bfc1b1392d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_019c7525-c68c-7afd-8159-88f57dc9f273" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c7525-c68c-733b-aabe-d3bfc1b1392d" xlink:to="loc_us-gaap_AccountsReceivableMember_019c7525-c68c-7afd-8159-88f57dc9f273" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesRevenueNetMember_019c7b96-3cdc-7c1c-9fb3-1012f21f9db5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesRevenueNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c7525-c68c-733b-aabe-d3bfc1b1392d" xlink:to="loc_us-gaap_SalesRevenueNetMember_019c7b96-3cdc-7c1c-9fb3-1012f21f9db5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019c7525-c68c-7fcc-87bd-116b383e77d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_528a2202-7e48-4fce-8baa-2362e700ae6c" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019c7525-c68c-7fcc-87bd-116b383e77d3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019c7525-c68c-7fcc-87bd-116b383e77d3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019c7525-c68c-7fcc-87bd-116b383e77d3" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019c7525-c68c-7fcc-87bd-116b383e77d3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019c7525-c68c-7711-b155-e0dd25a3bf18" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019c7525-c68c-7fcc-87bd-116b383e77d3" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019c7525-c68c-7711-b155-e0dd25a3bf18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019c7525-c68c-7413-ab09-fc0c2e1eb272" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019c7525-c68c-7711-b155-e0dd25a3bf18" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019c7525-c68c-7413-ab09-fc0c2e1eb272" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductConcentrationRiskMember_019c7b95-f463-7478-a76a-c4976eb6b143" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019c7525-c68c-7711-b155-e0dd25a3bf18" xlink:to="loc_us-gaap_ProductConcentrationRiskMember_019c7b95-f463-7478-a76a-c4976eb6b143" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_019c7526-460a-74e3-aebd-323226099546" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_528a2202-7e48-4fce-8baa-2362e700ae6c" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_019c7526-460a-74e3-aebd-323226099546" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019c7526-460a-74e3-aebd-323226099546_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019c7526-460a-74e3-aebd-323226099546" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019c7526-460a-74e3-aebd-323226099546_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019c7526-460a-77b4-b825-a356d151b060" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019c7526-460a-74e3-aebd-323226099546" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019c7526-460a-77b4-b825-a356d151b060" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember_019c7526-460a-7a38-80ac-482ca21626f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019c7526-460a-77b4-b825-a356d151b060" xlink:to="loc_us-gaap_OtherCurrentLiabilitiesMember_019c7526-460a-7a38-80ac-482ca21626f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_019c7526-460a-7d39-af90-0e5b92bfde8b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019c7526-460a-77b4-b825-a356d151b060" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_019c7526-460a-7d39-af90-0e5b92bfde8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_019c7525-8165-789b-b4d1-40b61b708e91" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_us-gaap_NumberOfOperatingSegments_019c7525-8165-789b-b4d1-40b61b708e91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019c7525-8165-74dd-b1d4-7aaddf2adb40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_us-gaap_NumberOfReportableSegments_019c7525-8165-74dd-b1d4-7aaddf2adb40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019c7525-c68c-7a5c-8bc6-184fb00316e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019c7525-c68c-7a5c-8bc6-184fb00316e3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumerationNotDisclosedFlag_019c7525-fc2a-7fd7-9bca-650b55b55d92" xlink:href="lcid-20251231.xsd#lcid_ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumerationNotDisclosedFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_lcid_ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumerationNotDisclosedFlag_019c7525-fc2a-7fd7-9bca-650b55b55d92" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_019c7525-fc2a-792e-8635-c72c655c0e1f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ImpairmentOfLongLivedAssetsHeldForUse"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_us-gaap_ImpairmentOfLongLivedAssetsHeldForUse_019c7525-fc2a-792e-8635-c72c655c0e1f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c7526-460a-7694-b48b-7d6a7342d178" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c7526-460a-7694-b48b-7d6a7342d178" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_BasicVehicleWarrantyTerm_019c7526-460a-79d0-ad66-8a2e23d710cc" xlink:href="lcid-20251231.xsd#lcid_BasicVehicleWarrantyTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_lcid_BasicVehicleWarrantyTerm_019c7526-460a-79d0-ad66-8a2e23d710cc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_019c7526-460a-727b-b873-be77d9705231" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_us-gaap_ContractWithCustomerLiability_019c7526-460a-727b-b873-be77d9705231" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ResidualValueGuaranteeLiabilityCurrent_019c7526-d5cf-7c64-a5ea-4dd1a6d61537" xlink:href="lcid-20251231.xsd#lcid_ResidualValueGuaranteeLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_lcid_ResidualValueGuaranteeLiabilityCurrent_019c7526-d5cf-7c64-a5ea-4dd1a6d61537" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ResidualValueGuaranteeMaximumAmountOfFuturePayments_019c7526-d5cf-7170-9114-a8d06a7a819d" xlink:href="lcid-20251231.xsd#lcid_ResidualValueGuaranteeMaximumAmountOfFuturePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_lcid_ResidualValueGuaranteeMaximumAmountOfFuturePayments_019c7526-d5cf-7170-9114-a8d06a7a819d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SupplierRecovery_019c7527-61e8-78ef-9876-64006805bca6" xlink:href="lcid-20251231.xsd#lcid_SupplierRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_lcid_SupplierRecovery_019c7527-61e8-78ef-9876-64006805bca6" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingExpense_019c752d-4368-7838-9a4a-1fc84645cf70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019c7525-8165-7bda-b874-64c9f07f334a" xlink:to="loc_us-gaap_AdvertisingExpense_019c752d-4368-7838-9a4a-1fc84645cf70" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofPropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofPropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESScheduleofPropertyPlantandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_a1753a65-d341-43fe-954f-8139207a65ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1899dc77-0e85-4fea-8e3d-389ee49d7431" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_a1753a65-d341-43fe-954f-8139207a65ff" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1899dc77-0e85-4fea-8e3d-389ee49d7431" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_304e1aef-0ed9-427d-bc14-a0df5477dd06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1899dc77-0e85-4fea-8e3d-389ee49d7431" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_304e1aef-0ed9-427d-bc14-a0df5477dd06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_304e1aef-0ed9-427d-bc14-a0df5477dd06_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_304e1aef-0ed9-427d-bc14-a0df5477dd06" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_304e1aef-0ed9-427d-bc14-a0df5477dd06_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_73a3535d-3fce-4e27-b905-ccbdd6e8f9c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_304e1aef-0ed9-427d-bc14-a0df5477dd06" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_73a3535d-3fce-4e27-b905-ccbdd6e8f9c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MachineryToolingAndVehiclesMember_551cebd9-fd1b-4de0-8eb6-e2ab0d1f943b" xlink:href="lcid-20251231.xsd#lcid_MachineryToolingAndVehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_73a3535d-3fce-4e27-b905-ccbdd6e8f9c5" xlink:to="loc_lcid_MachineryToolingAndVehiclesMember_551cebd9-fd1b-4de0-8eb6-e2ab0d1f943b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ComputerEquipmentAndSoftwareMember_689e41bc-7d6e-4875-8650-8e5ea6016a81" xlink:href="lcid-20251231.xsd#lcid_ComputerEquipmentAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_73a3535d-3fce-4e27-b905-ccbdd6e8f9c5" xlink:to="loc_lcid_ComputerEquipmentAndSoftwareMember_689e41bc-7d6e-4875-8650-8e5ea6016a81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_67ee1bfb-90d5-46e1-b06f-a801ac44c986" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_73a3535d-3fce-4e27-b905-ccbdd6e8f9c5" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_67ee1bfb-90d5-46e1-b06f-a801ac44c986" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_a7626568-a37c-4837-b7a6-ed2634d1183d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_73a3535d-3fce-4e27-b905-ccbdd6e8f9c5" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_a7626568-a37c-4837-b7a6-ed2634d1183d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_11cfb939-b93d-4c49-9ebe-51ba766de7f4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1899dc77-0e85-4fea-8e3d-389ee49d7431" xlink:to="loc_srt_RangeAxis_11cfb939-b93d-4c49-9ebe-51ba766de7f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_11cfb939-b93d-4c49-9ebe-51ba766de7f4_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_11cfb939-b93d-4c49-9ebe-51ba766de7f4" xlink:to="loc_srt_RangeMember_11cfb939-b93d-4c49-9ebe-51ba766de7f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_ff7db0fe-c2dd-4c02-9121-c7179c8b8081" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_11cfb939-b93d-4c49-9ebe-51ba766de7f4" xlink:to="loc_srt_RangeMember_ff7db0fe-c2dd-4c02-9121-c7179c8b8081" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_945edc61-6346-4c30-afe7-36e2b6fb6b57" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ff7db0fe-c2dd-4c02-9121-c7179c8b8081" xlink:to="loc_srt_MinimumMember_945edc61-6346-4c30-afe7-36e2b6fb6b57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_6f84bfee-6d5b-4484-b83c-33c64831b496" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ff7db0fe-c2dd-4c02-9121-c7179c8b8081" xlink:to="loc_srt_MaximumMember_6f84bfee-6d5b-4484-b83c-33c64831b496" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_d6868873-a0a5-464f-966f-60b1c1fd16ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_a1753a65-d341-43fe-954f-8139207a65ff" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_d6868873-a0a5-464f-966f-60b1c1fd16ee" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RESTRUCTURINGNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RESTRUCTURINGNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RESTRUCTURINGNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ab03db17-7bd8-4f40-9f9b-9ef1b50261d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4573be6c-60a4-4f18-9ed1-183dba06099a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ab03db17-7bd8-4f40-9f9b-9ef1b50261d5" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4573be6c-60a4-4f18-9ed1-183dba06099a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_0879b1e7-92d5-40ba-bb3f-8de22db03485" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4573be6c-60a4-4f18-9ed1-183dba06099a" xlink:to="loc_us-gaap_RestructuringPlanAxis_0879b1e7-92d5-40ba-bb3f-8de22db03485" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_0879b1e7-92d5-40ba-bb3f-8de22db03485_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_0879b1e7-92d5-40ba-bb3f-8de22db03485" xlink:to="loc_us-gaap_RestructuringPlanDomain_0879b1e7-92d5-40ba-bb3f-8de22db03485_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_dd0ea61b-73ad-4872-8311-3f4067ca9561" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_0879b1e7-92d5-40ba-bb3f-8de22db03485" xlink:to="loc_us-gaap_RestructuringPlanDomain_dd0ea61b-73ad-4872-8311-3f4067ca9561" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024RestructuringPlanMember_ec7849f4-adab-4c5c-bef4-fa1fb81f8819" xlink:href="lcid-20251231.xsd#lcid_A2024RestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_dd0ea61b-73ad-4872-8311-3f4067ca9561" xlink:to="loc_lcid_A2024RestructuringPlanMember_ec7849f4-adab-4c5c-bef4-fa1fb81f8819" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023RestructuringPlanMember_70c53ea3-e7a6-4159-b460-e66312db0b68" xlink:href="lcid-20251231.xsd#lcid_A2023RestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_dd0ea61b-73ad-4872-8311-3f4067ca9561" xlink:to="loc_lcid_A2023RestructuringPlanMember_70c53ea3-e7a6-4159-b460-e66312db0b68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_3fdf18d8-9d4c-40be-a696-14fc92723c5c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_ab03db17-7bd8-4f40-9f9b-9ef1b50261d5" xlink:to="loc_us-gaap_RestructuringCharges_3fdf18d8-9d4c-40be-a696-14fc92723c5c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RESTRUCTURINGScheduleofRestructuringLiabilitiesDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RESTRUCTURINGScheduleofRestructuringLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RESTRUCTURINGScheduleofRestructuringLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1d88453f-f036-4806-a0fa-0ab0f72f062a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_05e46667-61e1-41e2-ba30-e4552c6d4925" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1d88453f-f036-4806-a0fa-0ab0f72f062a" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_05e46667-61e1-41e2-ba30-e4552c6d4925" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_9c7267e7-6d50-4748-9484-c86d98d60def" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_05e46667-61e1-41e2-ba30-e4552c6d4925" xlink:to="loc_us-gaap_RestructuringPlanAxis_9c7267e7-6d50-4748-9484-c86d98d60def" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_9c7267e7-6d50-4748-9484-c86d98d60def_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_9c7267e7-6d50-4748-9484-c86d98d60def" xlink:to="loc_us-gaap_RestructuringPlanDomain_9c7267e7-6d50-4748-9484-c86d98d60def_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_bebf0e75-64a3-46d2-b8d3-e70e4d635530" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_9c7267e7-6d50-4748-9484-c86d98d60def" xlink:to="loc_us-gaap_RestructuringPlanDomain_bebf0e75-64a3-46d2-b8d3-e70e4d635530" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024RestructuringPlanMember_9fdfca2f-e0dd-44c3-9962-ca0f1162aad2" xlink:href="lcid-20251231.xsd#lcid_A2024RestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_bebf0e75-64a3-46d2-b8d3-e70e4d635530" xlink:to="loc_lcid_A2024RestructuringPlanMember_9fdfca2f-e0dd-44c3-9962-ca0f1162aad2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_831c2141-0200-4a46-8e5c-1ddb114879a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1d88453f-f036-4806-a0fa-0ab0f72f062a" xlink:to="loc_us-gaap_RestructuringReserveRollForward_831c2141-0200-4a46-8e5c-1ddb114879a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_63f23315-b076-4dac-92fc-1cce08c874cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_831c2141-0200-4a46-8e5c-1ddb114879a5" xlink:to="loc_us-gaap_RestructuringReserve_63f23315-b076-4dac-92fc-1cce08c874cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RestructuringChargesExcludingNonCash_87dd2839-5da2-48ac-8900-ccb32ff3b407" xlink:href="lcid-20251231.xsd#lcid_RestructuringChargesExcludingNonCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_831c2141-0200-4a46-8e5c-1ddb114879a5" xlink:to="loc_lcid_RestructuringChargesExcludingNonCash_87dd2839-5da2-48ac-8900-ccb32ff3b407" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_cb2b5f40-13e0-4ca2-bd11-71f424329b47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_831c2141-0200-4a46-8e5c-1ddb114879a5" xlink:to="loc_us-gaap_PaymentsForRestructuring_cb2b5f40-13e0-4ca2-bd11-71f424329b47" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_d37e968d-f3c8-4acb-804f-102ed5cbcd34" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringReserve"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RestructuringReserveNonCashItems_383eb330-d79f-4aa9-aa83-fd40efa8257d" xlink:href="lcid-20251231.xsd#lcid_RestructuringReserveNonCashItems"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1d88453f-f036-4806-a0fa-0ab0f72f062a" xlink:to="loc_lcid_RestructuringReserveNonCashItems_383eb330-d79f-4aa9-aa83-fd40efa8257d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_f8612ad0-3b4d-4c93-8204-8a79f2d1d568" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1d88453f-f036-4806-a0fa-0ab0f72f062a" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_f8612ad0-3b4d-4c93-8204-8a79f2d1d568" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedPaymentArrangementAcceleratedExpense_ce2c1123-88a3-4930-b743-601827982c15" xlink:href="lcid-20251231.xsd#lcid_ShareBasedPaymentArrangementAcceleratedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_1d88453f-f036-4806-a0fa-0ab0f72f062a" xlink:to="loc_lcid_ShareBasedPaymentArrangementAcceleratedExpense_ce2c1123-88a3-4930-b743-601827982c15" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/BALANCESHEETSCOMPONENTSScheduleofPropertyPlantandEquipmentNetDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#BALANCESHEETSCOMPONENTSScheduleofPropertyPlantandEquipmentNetDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/BALANCESHEETSCOMPONENTSScheduleofPropertyPlantandEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4761fa56-9478-45ed-ad3e-c93b13e5dc67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e8a05553-19ee-4373-ae7a-34e0617892c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4761fa56-9478-45ed-ad3e-c93b13e5dc67" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e8a05553-19ee-4373-ae7a-34e0617892c5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_63f21702-fa20-43c3-ad69-aa61920893a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e8a05553-19ee-4373-ae7a-34e0617892c5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_63f21702-fa20-43c3-ad69-aa61920893a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_63f21702-fa20-43c3-ad69-aa61920893a5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_63f21702-fa20-43c3-ad69-aa61920893a5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_63f21702-fa20-43c3-ad69-aa61920893a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_63f21702-fa20-43c3-ad69-aa61920893a5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandAndLandImprovementsMember_fbba13a2-dd28-440f-98d7-43cad1d825f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LandAndLandImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:to="loc_us-gaap_LandAndLandImprovementsMember_fbba13a2-dd28-440f-98d7-43cad1d825f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_076e16d5-ac39-4dc6-93f1-27096e213338" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_076e16d5-ac39-4dc6-93f1-27096e213338" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MachineryToolingAndVehiclesMember_1233b49d-c124-4333-93e4-b6573d1da13d" xlink:href="lcid-20251231.xsd#lcid_MachineryToolingAndVehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:to="loc_lcid_MachineryToolingAndVehiclesMember_1233b49d-c124-4333-93e4-b6573d1da13d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ServiceLoanerVehiclesMember_a9492b36-c4bb-4c77-9a1e-b92a3e4af16c" xlink:href="lcid-20251231.xsd#lcid_ServiceLoanerVehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lcid_MachineryToolingAndVehiclesMember_1233b49d-c124-4333-93e4-b6573d1da13d" xlink:to="loc_lcid_ServiceLoanerVehiclesMember_a9492b36-c4bb-4c77-9a1e-b92a3e4af16c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_OperatingLeaseVehiclesMember_dd34504f-a990-4d0f-be7b-531d7c29ac11" xlink:href="lcid-20251231.xsd#lcid_OperatingLeaseVehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lcid_MachineryToolingAndVehiclesMember_1233b49d-c124-4333-93e4-b6573d1da13d" xlink:to="loc_lcid_OperatingLeaseVehiclesMember_dd34504f-a990-4d0f-be7b-531d7c29ac11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ComputerEquipmentAndSoftwareMember_c1b28e47-21bd-4bae-a0f8-0684a255e874" xlink:href="lcid-20251231.xsd#lcid_ComputerEquipmentAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:to="loc_lcid_ComputerEquipmentAndSoftwareMember_c1b28e47-21bd-4bae-a0f8-0684a255e874" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_2ef88e03-6ef2-42cc-adcd-8953ef108c26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_2ef88e03-6ef2-42cc-adcd-8953ef108c26" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_88150e29-bb45-49ec-a17d-d902525c8614" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_88150e29-bb45-49ec-a17d-d902525c8614" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_FinanceLeasesMember_39fe4557-b051-4529-94eb-acf9ea89e391" xlink:href="lcid-20251231.xsd#lcid_FinanceLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:to="loc_lcid_FinanceLeasesMember_39fe4557-b051-4529-94eb-acf9ea89e391" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_0695d450-6607-40e3-8193-bdafd1e67e97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:to="loc_us-gaap_ConstructionInProgressMember_0695d450-6607-40e3-8193-bdafd1e67e97" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AMP2BuildingBalanceMember_03d05ddd-d008-4399-8e9f-90497df1b283" xlink:href="lcid-20251231.xsd#lcid_AMP2BuildingBalanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c51affd9-96b1-43c8-94ff-aa40e15c1f2d" xlink:to="loc_lcid_AMP2BuildingBalanceMember_03d05ddd-d008-4399-8e9f-90497df1b283" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_b4c14157-42de-4313-9535-7e69d6b044ca" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e8a05553-19ee-4373-ae7a-34e0617892c5" xlink:to="loc_srt_CounterpartyNameAxis_b4c14157-42de-4313-9535-7e69d6b044ca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_b4c14157-42de-4313-9535-7e69d6b044ca_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_b4c14157-42de-4313-9535-7e69d6b044ca" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_b4c14157-42de-4313-9535-7e69d6b044ca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_d44cf941-6299-433a-896d-e8622dc73932" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_b4c14157-42de-4313-9535-7e69d6b044ca" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_d44cf941-6299-433a-896d-e8622dc73932" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MinistryOfInvestmentOfSaudiArabiaMember_fa738cb6-dd05-4a9e-a899-c6a02bad6bc1" xlink:href="lcid-20251231.xsd#lcid_MinistryOfInvestmentOfSaudiArabiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_d44cf941-6299-433a-896d-e8622dc73932" xlink:to="loc_lcid_MinistryOfInvestmentOfSaudiArabiaMember_fa738cb6-dd05-4a9e-a899-c6a02bad6bc1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_90bcee88-43f7-45e6-b489-8ae5df338e76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e8a05553-19ee-4373-ae7a-34e0617892c5" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_90bcee88-43f7-45e6-b489-8ae5df338e76" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_90bcee88-43f7-45e6-b489-8ae5df338e76_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_90bcee88-43f7-45e6-b489-8ae5df338e76" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_90bcee88-43f7-45e6-b489-8ae5df338e76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_d74e81d3-1d5f-422b-9292-4be7c7a8fde0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_90bcee88-43f7-45e6-b489-8ae5df338e76" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_d74e81d3-1d5f-422b-9292-4be7c7a8fde0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MISAAgreementGovernmentGrantMember_d10610d4-9263-4ac0-b27a-74386493757b" xlink:href="lcid-20251231.xsd#lcid_MISAAgreementGovernmentGrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_d74e81d3-1d5f-422b-9292-4be7c7a8fde0" xlink:to="loc_lcid_MISAAgreementGovernmentGrantMember_d10610d4-9263-4ac0-b27a-74386493757b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_9e645624-f405-41c3-a189-d3532ebaf2c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e8a05553-19ee-4373-ae7a-34e0617892c5" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_9e645624-f405-41c3-a189-d3532ebaf2c7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_9e645624-f405-41c3-a189-d3532ebaf2c7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_9e645624-f405-41c3-a189-d3532ebaf2c7" xlink:to="loc_us-gaap_RelatedPartyDomain_9e645624-f405-41c3-a189-d3532ebaf2c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_c494050e-a216-49c5-ad78-1eed07d50388" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_9e645624-f405-41c3-a189-d3532ebaf2c7" xlink:to="loc_us-gaap_RelatedPartyDomain_c494050e-a216-49c5-ad78-1eed07d50388" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_b0f0df16-791f-4e77-a334-2acf3ea6ba13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_c494050e-a216-49c5-ad78-1eed07d50388" xlink:to="loc_us-gaap_RelatedPartyMember_b0f0df16-791f-4e77-a334-2acf3ea6ba13" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_2385ac4e-4f0b-4e95-8566-d4c69e28639e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4761fa56-9478-45ed-ad3e-c93b13e5dc67" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_2385ac4e-4f0b-4e95-8566-d4c69e28639e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_0ddcfbf1-ccd0-41e9-8fb4-9aee2149ed0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4761fa56-9478-45ed-ad3e-c93b13e5dc67" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_0ddcfbf1-ccd0-41e9-8fb4-9aee2149ed0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_8cacb2b7-5dac-4504-afd7-aee5062b53f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4761fa56-9478-45ed-ad3e-c93b13e5dc67" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_8cacb2b7-5dac-4504-afd7-aee5062b53f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_37ac68f7-58cf-4454-82b5-6868b96a2989" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4761fa56-9478-45ed-ad3e-c93b13e5dc67" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_37ac68f7-58cf-4454-82b5-6868b96a2989" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_63b9448c-34a3-42ba-90d7-b9bc0453c83a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4761fa56-9478-45ed-ad3e-c93b13e5dc67" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_63b9448c-34a3-42ba-90d7-b9bc0453c83a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_e1e49fcf-5b19-4f2d-99a8-298296762020" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_4761fa56-9478-45ed-ad3e-c93b13e5dc67" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_e1e49fcf-5b19-4f2d-99a8-298296762020" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/BALANCESHEETSCOMPONENTSScheduleofConstructioninProgressDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#BALANCESHEETSCOMPONENTSScheduleofConstructioninProgressDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/BALANCESHEETSCOMPONENTSScheduleofConstructioninProgressDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_fba655a1-40d4-4890-ba0f-4bc4b3cabfb3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_d65ff19a-d65c-4f29-976a-4698da54ccaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_fba655a1-40d4-4890-ba0f-4bc4b3cabfb3" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_d65ff19a-d65c-4f29-976a-4698da54ccaa" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2a566595-c30b-4ccb-b87c-3f7bed799ef7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_d65ff19a-d65c-4f29-976a-4698da54ccaa" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2a566595-c30b-4ccb-b87c-3f7bed799ef7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2a566595-c30b-4ccb-b87c-3f7bed799ef7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2a566595-c30b-4ccb-b87c-3f7bed799ef7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2a566595-c30b-4ccb-b87c-3f7bed799ef7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_56519a3c-3ca9-4773-9496-e2c3b19d75e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2a566595-c30b-4ccb-b87c-3f7bed799ef7" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_56519a3c-3ca9-4773-9496-e2c3b19d75e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MachineryAndToolingMember_c4e45c21-27a1-429a-855a-30edb7b90a79" xlink:href="lcid-20251231.xsd#lcid_MachineryAndToolingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_56519a3c-3ca9-4773-9496-e2c3b19d75e9" xlink:to="loc_lcid_MachineryAndToolingMember_c4e45c21-27a1-429a-855a-30edb7b90a79" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetUnderConstructionMember_79552f07-9288-4a16-a5ae-cf2c2fccd478" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetUnderConstructionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_56519a3c-3ca9-4773-9496-e2c3b19d75e9" xlink:to="loc_us-gaap_AssetUnderConstructionMember_79552f07-9288-4a16-a5ae-cf2c2fccd478" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AMP2ConstructionInProgressBalanceMember_e69dc997-b05c-43d3-bc10-170cddf05e2c" xlink:href="lcid-20251231.xsd#lcid_AMP2ConstructionInProgressBalanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetUnderConstructionMember_79552f07-9288-4a16-a5ae-cf2c2fccd478" xlink:to="loc_lcid_AMP2ConstructionInProgressBalanceMember_e69dc997-b05c-43d3-bc10-170cddf05e2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ConstructionInProgressLeaseholdImprovementsMember_fe0b6889-827f-41d8-aa9f-36623e1664b3" xlink:href="lcid-20251231.xsd#lcid_ConstructionInProgressLeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_56519a3c-3ca9-4773-9496-e2c3b19d75e9" xlink:to="loc_lcid_ConstructionInProgressLeaseholdImprovementsMember_fe0b6889-827f-41d8-aa9f-36623e1664b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_9036ea45-8ec7-4652-9c21-89061e51a4f4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_d65ff19a-d65c-4f29-976a-4698da54ccaa" xlink:to="loc_srt_CounterpartyNameAxis_9036ea45-8ec7-4652-9c21-89061e51a4f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9036ea45-8ec7-4652-9c21-89061e51a4f4_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_9036ea45-8ec7-4652-9c21-89061e51a4f4" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9036ea45-8ec7-4652-9c21-89061e51a4f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_0f21ffb2-6964-4d95-b2a1-2943e219ea01" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_9036ea45-8ec7-4652-9c21-89061e51a4f4" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_0f21ffb2-6964-4d95-b2a1-2943e219ea01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MinistryOfInvestmentOfSaudiArabiaMember_347f8c05-fbc2-4901-a1ff-0c04f4a1a243" xlink:href="lcid-20251231.xsd#lcid_MinistryOfInvestmentOfSaudiArabiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_0f21ffb2-6964-4d95-b2a1-2943e219ea01" xlink:to="loc_lcid_MinistryOfInvestmentOfSaudiArabiaMember_347f8c05-fbc2-4901-a1ff-0c04f4a1a243" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_1341cd64-def9-4665-a465-ff7f2b5ef04b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_d65ff19a-d65c-4f29-976a-4698da54ccaa" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_1341cd64-def9-4665-a465-ff7f2b5ef04b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_1341cd64-def9-4665-a465-ff7f2b5ef04b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_1341cd64-def9-4665-a465-ff7f2b5ef04b" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_1341cd64-def9-4665-a465-ff7f2b5ef04b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_77281bcf-977c-470c-b7fc-06ea4b61aa6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_1341cd64-def9-4665-a465-ff7f2b5ef04b" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_77281bcf-977c-470c-b7fc-06ea4b61aa6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MISAAgreementGovernmentGrantMember_b2584872-db3c-4cf6-9724-0de260f05217" xlink:href="lcid-20251231.xsd#lcid_MISAAgreementGovernmentGrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_77281bcf-977c-470c-b7fc-06ea4b61aa6b" xlink:to="loc_lcid_MISAAgreementGovernmentGrantMember_b2584872-db3c-4cf6-9724-0de260f05217" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_0b37df62-5de8-48c5-ba49-236c181bac5e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_d65ff19a-d65c-4f29-976a-4698da54ccaa" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_0b37df62-5de8-48c5-ba49-236c181bac5e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_0b37df62-5de8-48c5-ba49-236c181bac5e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_0b37df62-5de8-48c5-ba49-236c181bac5e" xlink:to="loc_us-gaap_RelatedPartyDomain_0b37df62-5de8-48c5-ba49-236c181bac5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_02660275-6bc5-4ecc-80f6-99f3bffabc94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_0b37df62-5de8-48c5-ba49-236c181bac5e" xlink:to="loc_us-gaap_RelatedPartyDomain_02660275-6bc5-4ecc-80f6-99f3bffabc94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_dc6f9f2e-559a-44da-b168-74fc19b55288" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_02660275-6bc5-4ecc-80f6-99f3bffabc94" xlink:to="loc_us-gaap_RelatedPartyMember_dc6f9f2e-559a-44da-b168-74fc19b55288" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressGross_c0aec584-3e10-48e4-9abd-31f49ddab3e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionInProgressGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_fba655a1-40d4-4890-ba0f-4bc4b3cabfb3" xlink:to="loc_us-gaap_ConstructionInProgressGross_c0aec584-3e10-48e4-9abd-31f49ddab3e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_4ed5ece8-88b5-4292-9d92-617013ce5f80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_fba655a1-40d4-4890-ba0f-4bc4b3cabfb3" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_4ed5ece8-88b5-4292-9d92-617013ce5f80" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/BALANCESHEETSCOMPONENTSScheduleofOtherLongTermLiabilitiesDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#BALANCESHEETSCOMPONENTSScheduleofOtherLongTermLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/BALANCESHEETSCOMPONENTSScheduleofOtherLongTermLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_7294961e-fb2f-4d64-bac0-843eee8e663b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_08ddf8b8-125c-44b0-99c8-a873a3e274f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_7294961e-fb2f-4d64-bac0-843eee8e663b" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_08ddf8b8-125c-44b0-99c8-a873a3e274f5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_4b425f52-ce61-4ae6-97e1-7df0feda25f1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_08ddf8b8-125c-44b0-99c8-a873a3e274f5" xlink:to="loc_srt_CounterpartyNameAxis_4b425f52-ce61-4ae6-97e1-7df0feda25f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_4b425f52-ce61-4ae6-97e1-7df0feda25f1_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_4b425f52-ce61-4ae6-97e1-7df0feda25f1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_4b425f52-ce61-4ae6-97e1-7df0feda25f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_c2b0cca6-3d1e-4a9e-8283-423aac99248d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_4b425f52-ce61-4ae6-97e1-7df0feda25f1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_c2b0cca6-3d1e-4a9e-8283-423aac99248d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MinistryOfInvestmentOfSaudiArabiaMember_4530fe56-bf0b-487e-8562-7bba52bd303b" xlink:href="lcid-20251231.xsd#lcid_MinistryOfInvestmentOfSaudiArabiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_c2b0cca6-3d1e-4a9e-8283-423aac99248d" xlink:to="loc_lcid_MinistryOfInvestmentOfSaudiArabiaMember_4530fe56-bf0b-487e-8562-7bba52bd303b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AstonMartinLagondaGlobalHoldingsPlcMember_cf519f97-99a4-4464-9002-0bdb5fd971b8" xlink:href="lcid-20251231.xsd#lcid_AstonMartinLagondaGlobalHoldingsPlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_c2b0cca6-3d1e-4a9e-8283-423aac99248d" xlink:to="loc_lcid_AstonMartinLagondaGlobalHoldingsPlcMember_cf519f97-99a4-4464-9002-0bdb5fd971b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_8115e669-0109-40ab-a2ff-de65df2933a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_08ddf8b8-125c-44b0-99c8-a873a3e274f5" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_8115e669-0109-40ab-a2ff-de65df2933a1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_8115e669-0109-40ab-a2ff-de65df2933a1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_8115e669-0109-40ab-a2ff-de65df2933a1" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_8115e669-0109-40ab-a2ff-de65df2933a1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_13cbd171-453d-4824-9904-9281ff2a4549" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_8115e669-0109-40ab-a2ff-de65df2933a1" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_13cbd171-453d-4824-9904-9281ff2a4549" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_ca63faa8-566c-4a83-89a9-254117f91d74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_13cbd171-453d-4824-9904-9281ff2a4549" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_ca63faa8-566c-4a83-89a9-254117f91d74" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_95d6c537-ad49-45d8-b02b-b844b2c58f63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_08ddf8b8-125c-44b0-99c8-a873a3e274f5" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_95d6c537-ad49-45d8-b02b-b844b2c58f63" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_95d6c537-ad49-45d8-b02b-b844b2c58f63_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_95d6c537-ad49-45d8-b02b-b844b2c58f63" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_95d6c537-ad49-45d8-b02b-b844b2c58f63_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_b081aaf7-ad42-4499-bda1-2f9f2603d4c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_95d6c537-ad49-45d8-b02b-b844b2c58f63" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_b081aaf7-ad42-4499-bda1-2f9f2603d4c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MISAAgreementGovernmentGrantMember_8bf61480-1771-46f6-91fc-bf2f768c13c5" xlink:href="lcid-20251231.xsd#lcid_MISAAgreementGovernmentGrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_b081aaf7-ad42-4499-bda1-2f9f2603d4c7" xlink:to="loc_lcid_MISAAgreementGovernmentGrantMember_8bf61480-1771-46f6-91fc-bf2f768c13c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_StrategicTechnologyArrangementMember_6328ab28-e21b-45f9-8f75-10d795744a28" xlink:href="lcid-20251231.xsd#lcid_StrategicTechnologyArrangementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_b081aaf7-ad42-4499-bda1-2f9f2603d4c7" xlink:to="loc_lcid_StrategicTechnologyArrangementMember_6328ab28-e21b-45f9-8f75-10d795744a28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3d6e1179-bc94-400c-bda6-5cbfc8dabd09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_08ddf8b8-125c-44b0-99c8-a873a3e274f5" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3d6e1179-bc94-400c-bda6-5cbfc8dabd09" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_3d6e1179-bc94-400c-bda6-5cbfc8dabd09_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3d6e1179-bc94-400c-bda6-5cbfc8dabd09" xlink:to="loc_us-gaap_RelatedPartyDomain_3d6e1179-bc94-400c-bda6-5cbfc8dabd09_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_8d1df0d8-a2c7-4393-bb8a-a8512ad54812" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3d6e1179-bc94-400c-bda6-5cbfc8dabd09" xlink:to="loc_us-gaap_RelatedPartyDomain_8d1df0d8-a2c7-4393-bb8a-a8512ad54812" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_bf2e71e9-6a11-4d68-bb54-0a60adcc980a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_8d1df0d8-a2c7-4393-bb8a-a8512ad54812" xlink:to="loc_us-gaap_RelatedPartyMember_bf2e71e9-6a11-4d68-bb54-0a60adcc980a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationAxis_44b223c2-9575-4c95-8629-52011a9ebdcb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_08ddf8b8-125c-44b0-99c8-a873a3e274f5" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationAxis_44b223c2-9575-4c95-8629-52011a9ebdcb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain_44b223c2-9575-4c95-8629-52011a9ebdcb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationAxis_44b223c2-9575-4c95-8629-52011a9ebdcb" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain_44b223c2-9575-4c95-8629-52011a9ebdcb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain_d44c0e72-3e7d-4d86-b240-f3ca8ffd5a7b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationAxis_44b223c2-9575-4c95-8629-52011a9ebdcb" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain_d44c0e72-3e7d-4d86-b240-f3ca8ffd5a7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_526e7f9f-03ec-4f40-b8ef-e2ddaf8c06fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain_d44c0e72-3e7d-4d86-b240-f3ca8ffd5a7b" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_526e7f9f-03ec-4f40-b8ef-e2ddaf8c06fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_87e47fce-6111-485f-a49b-f383186bbce2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_7294961e-fb2f-4d64-bac0-843eee8e663b" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_87e47fce-6111-485f-a49b-f383186bbce2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSundryLiabilitiesNoncurrent_a4a86524-24d5-443f-8d56-6caf58ec32b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherSundryLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_7294961e-fb2f-4d64-bac0-843eee8e663b" xlink:to="loc_us-gaap_OtherSundryLiabilitiesNoncurrent_a4a86524-24d5-443f-8d56-6caf58ec32b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_e78c0ffd-f1f8-4624-abcd-220d1a0fd126" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_7294961e-fb2f-4d64-bac0-843eee8e663b" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_e78c0ffd-f1f8-4624-abcd-220d1a0fd126" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_019b12d1-653c-7352-a17d-9a324696266c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StandardProductWarrantyAccrual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_7294961e-fb2f-4d64-bac0-843eee8e663b" xlink:to="loc_us-gaap_StandardProductWarrantyAccrual_019b12d1-653c-7352-a17d-9a324696266c" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/BALANCESHEETSCOMPONENTSScheduleofAccruedWarrantyActivitiesDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#BALANCESHEETSCOMPONENTSScheduleofAccruedWarrantyActivitiesDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/BALANCESHEETSCOMPONENTSScheduleofAccruedWarrantyActivitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyLiabilityLineItems_92eeca37-f7c8-43d7-9e55-e813a01c26a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductWarrantyLiabilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyLiabilityTable_872b757c-3313-40c4-ac68-b5232df341d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductWarrantyLiabilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_92eeca37-f7c8-43d7-9e55-e813a01c26a6" xlink:to="loc_us-gaap_ProductWarrantyLiabilityTable_872b757c-3313-40c4-ac68-b5232df341d0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_WarrantyTypeAxis_13ee54cb-d8c3-4bfb-a2cd-e4da0f1a992c" xlink:href="lcid-20251231.xsd#lcid_WarrantyTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ProductWarrantyLiabilityTable_872b757c-3313-40c4-ac68-b5232df341d0" xlink:to="loc_lcid_WarrantyTypeAxis_13ee54cb-d8c3-4bfb-a2cd-e4da0f1a992c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_WarrantyTypeDomain_13ee54cb-d8c3-4bfb-a2cd-e4da0f1a992c_default" xlink:href="lcid-20251231.xsd#lcid_WarrantyTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_lcid_WarrantyTypeAxis_13ee54cb-d8c3-4bfb-a2cd-e4da0f1a992c" xlink:to="loc_lcid_WarrantyTypeDomain_13ee54cb-d8c3-4bfb-a2cd-e4da0f1a992c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_WarrantyTypeDomain_322c84fe-dcc8-4273-a632-fed6e9a37eb9" xlink:href="lcid-20251231.xsd#lcid_WarrantyTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_lcid_WarrantyTypeAxis_13ee54cb-d8c3-4bfb-a2cd-e4da0f1a992c" xlink:to="loc_lcid_WarrantyTypeDomain_322c84fe-dcc8-4273-a632-fed6e9a37eb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SpecialWarrantyCampaignMember_e7ba21e9-763d-4662-964b-e3cd3d675b64" xlink:href="lcid-20251231.xsd#lcid_SpecialWarrantyCampaignMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lcid_WarrantyTypeDomain_322c84fe-dcc8-4273-a632-fed6e9a37eb9" xlink:to="loc_lcid_SpecialWarrantyCampaignMember_e7ba21e9-763d-4662-964b-e3cd3d675b64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_6ee8ad5e-8e6c-4934-a657-54403ce8b0f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ProductWarrantyLiabilityTable_872b757c-3313-40c4-ac68-b5232df341d0" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_6ee8ad5e-8e6c-4934-a657-54403ce8b0f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_6ee8ad5e-8e6c-4934-a657-54403ce8b0f1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6ee8ad5e-8e6c-4934-a657-54403ce8b0f1" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_6ee8ad5e-8e6c-4934-a657-54403ce8b0f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_26fc1b6c-a7c5-4428-bb62-4b2dd1af4d19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6ee8ad5e-8e6c-4934-a657-54403ce8b0f1" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_26fc1b6c-a7c5-4428-bb62-4b2dd1af4d19" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember_7c8f00e6-69bf-46a0-992c-f25d8e480897" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_26fc1b6c-a7c5-4428-bb62-4b2dd1af4d19" xlink:to="loc_us-gaap_OtherCurrentLiabilitiesMember_7c8f00e6-69bf-46a0-992c-f25d8e480897" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_d47e37e6-b495-4730-bcb0-44350c69240b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_26fc1b6c-a7c5-4428-bb62-4b2dd1af4d19" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_d47e37e6-b495-4730-bcb0-44350c69240b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward_619e14f4-6b47-437b-8327-3a0e8076b1df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductWarrantyLiabilityLineItems_92eeca37-f7c8-43d7-9e55-e813a01c26a6" xlink:to="loc_us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward_619e14f4-6b47-437b-8327-3a0e8076b1df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_c072123e-13ed-4d26-b139-9e953b1b02f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StandardProductWarrantyAccrual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward_619e14f4-6b47-437b-8327-3a0e8076b1df" xlink:to="loc_us-gaap_StandardProductWarrantyAccrual_c072123e-13ed-4d26-b139-9e953b1b02f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualPayments_7e5f88a1-388b-4dab-8a48-a92533884d4d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StandardProductWarrantyAccrualPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward_619e14f4-6b47-437b-8327-3a0e8076b1df" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualPayments_7e5f88a1-388b-4dab-8a48-a92533884d4d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_5a6bf4bf-9c08-4741-b208-42c655a453cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StandardProductWarrantyAccrualWarrantiesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward_619e14f4-6b47-437b-8327-3a0e8076b1df" xlink:to="loc_us-gaap_StandardProductWarrantyAccrualWarrantiesIssued_5a6bf4bf-9c08-4741-b208-42c655a453cf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StandardProductWarrantyAccrual_13761d2e-dab9-4e74-95ce-10656af9f665" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StandardProductWarrantyAccrual"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSScheduleofFinancialAssetsSubjecttoFairValueMeasurementsonaRecurringBasisbyLevelWithintheFairValueHierarchyDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSScheduleofFinancialAssetsSubjecttoFairValueMeasurementsonaRecurringBasisbyLevelWithintheFairValueHierarchyDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSScheduleofFinancialAssetsSubjecttoFairValueMeasurementsonaRecurringBasisbyLevelWithintheFairValueHierarchyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a87fe2e1-568d-4940-aa86-70ddb05a6abb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a87fe2e1-568d-4940-aa86-70ddb05a6abb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_aeed60b3-d5c8-47e9-a558-d3654a3fcfa3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a87fe2e1-568d-4940-aa86-70ddb05a6abb" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_aeed60b3-d5c8-47e9-a558-d3654a3fcfa3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_aeed60b3-d5c8-47e9-a558-d3654a3fcfa3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_aeed60b3-d5c8-47e9-a558-d3654a3fcfa3" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_aeed60b3-d5c8-47e9-a558-d3654a3fcfa3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_037dcb36-64b2-4b62-b35c-4764a2884879" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_aeed60b3-d5c8-47e9-a558-d3654a3fcfa3" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_037dcb36-64b2-4b62-b35c-4764a2884879" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashMember_75eb3f6c-50a9-4441-a447-d19108492e62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_037dcb36-64b2-4b62-b35c-4764a2884879" xlink:to="loc_us-gaap_CashMember_75eb3f6c-50a9-4441-a447-d19108492e62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_d39b50fe-ad3b-425f-9b6b-5478968ce2c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a87fe2e1-568d-4940-aa86-70ddb05a6abb" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_d39b50fe-ad3b-425f-9b6b-5478968ce2c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_d39b50fe-ad3b-425f-9b6b-5478968ce2c4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_d39b50fe-ad3b-425f-9b6b-5478968ce2c4" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_d39b50fe-ad3b-425f-9b6b-5478968ce2c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_c403a983-1dde-4504-b3b9-f2a8086ae00f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_d39b50fe-ad3b-425f-9b6b-5478968ce2c4" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_c403a983-1dde-4504-b3b9-f2a8086ae00f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_30ec8ba9-ab33-4afa-ad40-db6a82bb48dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_c403a983-1dde-4504-b3b9-f2a8086ae00f" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_30ec8ba9-ab33-4afa-ad40-db6a82bb48dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_eed51ce1-7f4f-41d9-b823-0c2732f1634d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a87fe2e1-568d-4940-aa86-70ddb05a6abb" xlink:to="loc_us-gaap_FinancialInstrumentAxis_eed51ce1-7f4f-41d9-b823-0c2732f1634d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_eed51ce1-7f4f-41d9-b823-0c2732f1634d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_eed51ce1-7f4f-41d9-b823-0c2732f1634d" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_eed51ce1-7f4f-41d9-b823-0c2732f1634d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b8badaa3-9339-4f5a-97cc-a8bfc765fcb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_eed51ce1-7f4f-41d9-b823-0c2732f1634d" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b8badaa3-9339-4f5a-97cc-a8bfc765fcb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_d046dd91-204f-4a7c-a75d-cb8ea22385a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b8badaa3-9339-4f5a-97cc-a8bfc765fcb1" xlink:to="loc_us-gaap_MoneyMarketFundsMember_d046dd91-204f-4a7c-a75d-cb8ea22385a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_8f325069-53c1-4227-98a6-46b45ee0bb8b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b8badaa3-9339-4f5a-97cc-a8bfc765fcb1" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_8f325069-53c1-4227-98a6-46b45ee0bb8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankTimeDepositsMember_6606fe36-781d-4001-8c10-9e670fd4872b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BankTimeDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b8badaa3-9339-4f5a-97cc-a8bfc765fcb1" xlink:to="loc_us-gaap_BankTimeDepositsMember_6606fe36-781d-4001-8c10-9e670fd4872b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_64549778-0495-42c0-b584-6ced333e8082" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b8badaa3-9339-4f5a-97cc-a8bfc765fcb1" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_64549778-0495-42c0-b584-6ced333e8082" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CertificatesOfDepositMember_cf128d9b-2f3f-4f2d-a5d9-691ca81aff53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CertificatesOfDepositMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b8badaa3-9339-4f5a-97cc-a8bfc765fcb1" xlink:to="loc_us-gaap_CertificatesOfDepositMember_cf128d9b-2f3f-4f2d-a5d9-691ca81aff53" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_c2acc2be-beb5-4fa6-bc4e-5c0ee0938d67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b8badaa3-9339-4f5a-97cc-a8bfc765fcb1" xlink:to="loc_us-gaap_CommercialPaperMember_c2acc2be-beb5-4fa6-bc4e-5c0ee0938d67" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_bc28b720-84e1-430d-a1ec-fca7dbe72ace" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a87fe2e1-568d-4940-aa86-70ddb05a6abb" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_bc28b720-84e1-430d-a1ec-fca7dbe72ace" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_bc28b720-84e1-430d-a1ec-fca7dbe72ace_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_bc28b720-84e1-430d-a1ec-fca7dbe72ace" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_bc28b720-84e1-430d-a1ec-fca7dbe72ace_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_210280fd-8632-4c83-a2a1-bcdd887ba2c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_bc28b720-84e1-430d-a1ec-fca7dbe72ace" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_210280fd-8632-4c83-a2a1-bcdd887ba2c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_2143738b-eea8-485d-b854-d3bdf737b1b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_210280fd-8632-4c83-a2a1-bcdd887ba2c5" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_2143738b-eea8-485d-b854-d3bdf737b1b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_81dfa4e4-8f37-4f49-9b2c-a6b29d2250ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_210280fd-8632-4c83-a2a1-bcdd887ba2c5" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_81dfa4e4-8f37-4f49-9b2c-a6b29d2250ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_08c0d887-2262-45b8-a4ee-91a293e6d242" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a87fe2e1-568d-4940-aa86-70ddb05a6abb" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_08c0d887-2262-45b8-a4ee-91a293e6d242" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_08c0d887-2262-45b8-a4ee-91a293e6d242_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_08c0d887-2262-45b8-a4ee-91a293e6d242" xlink:to="loc_us-gaap_RelatedPartyDomain_08c0d887-2262-45b8-a4ee-91a293e6d242_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_8ce3ced0-7dc0-4363-911e-a3d0a73ed515" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_08c0d887-2262-45b8-a4ee-91a293e6d242" xlink:to="loc_us-gaap_RelatedPartyDomain_8ce3ced0-7dc0-4363-911e-a3d0a73ed515" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_3d6e04d9-2aaf-40cd-b91c-77c84cc272f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_8ce3ced0-7dc0-4363-911e-a3d0a73ed515" xlink:to="loc_us-gaap_RelatedPartyMember_3d6e04d9-2aaf-40cd-b91c-77c84cc272f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_e1954869-a1e9-4967-a775-2b73499485cd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a87fe2e1-568d-4940-aa86-70ddb05a6abb" xlink:to="loc_srt_CounterpartyNameAxis_e1954869-a1e9-4967-a775-2b73499485cd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_e1954869-a1e9-4967-a775-2b73499485cd_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_e1954869-a1e9-4967-a775-2b73499485cd" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_e1954869-a1e9-4967-a775-2b73499485cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_85413163-7f2c-4726-986c-fbb3d579692b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_e1954869-a1e9-4967-a775-2b73499485cd" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_85413163-7f2c-4726-986c-fbb3d579692b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_GIBMember_d9a92a2e-45f9-4ace-b58e-22d090c9f937" xlink:href="lcid-20251231.xsd#lcid_GIBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_85413163-7f2c-4726-986c-fbb3d579692b" xlink:to="loc_lcid_GIBMember_d9a92a2e-45f9-4ace-b58e-22d090c9f937" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_c829e081-e335-46b5-806a-46f8369f0292" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_c829e081-e335-46b5-806a-46f8369f0292" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_e9cfd5d8-6d82-486a-bd0b-cfd0350c5e84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_e9cfd5d8-6d82-486a-bd0b-cfd0350c5e84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_4a7aee61-1e97-4a59-965c-2b3a0d979ea6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_4a7aee61-1e97-4a59-965c-2b3a0d979ea6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_182b8565-be76-4b36-ba0b-97c665446b84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_182b8565-be76-4b36-ba0b-97c665446b84" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_c2cae8ba-dbc8-47b7-8e7c-a79fc9551721" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_c2cae8ba-dbc8-47b7-8e7c-a79fc9551721" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_25a2520d-25cc-45c1-89ef-627237ad4039" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_25a2520d-25cc-45c1-89ef-627237ad4039" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestments_96c21477-fbd4-4f54-95c7-948f3a6d1554" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_ShortTermInvestments_96c21477-fbd4-4f54-95c7-948f3a6d1554" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermInvestments_feeb0a1e-7753-427f-9df7-e6a45adc5eda" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_LongTermInvestments_feeb0a1e-7753-427f-9df7-e6a45adc5eda" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AssetsAmortizedCost_8dd910ba-5bcd-4e77-846b-f759f6046f9a" xlink:href="lcid-20251231.xsd#lcid_AssetsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_lcid_AssetsAmortizedCost_8dd910ba-5bcd-4e77-846b-f759f6046f9a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_d78531fe-3a65-4ba6-b5c4-325c2cd5c01e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_d78531fe-3a65-4ba6-b5c4-325c2cd5c01e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_34c6b526-a620-4fde-b547-29c024540c4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_34c6b526-a620-4fde-b547-29c024540c4c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_019b12c0-86bd-7ac6-9ebc-f709f567f06f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f5bde53e-2996-47ad-9dc1-4f9a9bafbd77" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_019b12c0-86bd-7ac6-9ebc-f709f567f06f" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_70f3da26-8004-4434-9f8f-3a44ac59a19c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_146b7cdf-1cba-42c3-87d5-819bd6f77386" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_70f3da26-8004-4434-9f8f-3a44ac59a19c" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_146b7cdf-1cba-42c3-87d5-819bd6f77386" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_7f8a5eb2-e2fe-4b80-8681-40133ee031d1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_146b7cdf-1cba-42c3-87d5-819bd6f77386" xlink:to="loc_srt_CounterpartyNameAxis_7f8a5eb2-e2fe-4b80-8681-40133ee031d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_7f8a5eb2-e2fe-4b80-8681-40133ee031d1_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_7f8a5eb2-e2fe-4b80-8681-40133ee031d1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_7f8a5eb2-e2fe-4b80-8681-40133ee031d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_937b48b0-3fd8-4d9d-85f1-aa3926685694" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_7f8a5eb2-e2fe-4b80-8681-40133ee031d1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_937b48b0-3fd8-4d9d-85f1-aa3926685694" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AstonMartinLagondaGlobalHoldingsPlcMember_5fc86cdb-3c26-4ddc-a81b-6bdf823e827a" xlink:href="lcid-20251231.xsd#lcid_AstonMartinLagondaGlobalHoldingsPlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_937b48b0-3fd8-4d9d-85f1-aa3926685694" xlink:to="loc_lcid_AstonMartinLagondaGlobalHoldingsPlcMember_5fc86cdb-3c26-4ddc-a81b-6bdf823e827a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_1b11a8ae-1dcf-44e5-89a4-c5befb865d85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_146b7cdf-1cba-42c3-87d5-819bd6f77386" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_1b11a8ae-1dcf-44e5-89a4-c5befb865d85" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_1b11a8ae-1dcf-44e5-89a4-c5befb865d85_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_1b11a8ae-1dcf-44e5-89a4-c5befb865d85" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_1b11a8ae-1dcf-44e5-89a4-c5befb865d85_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_783b1d3c-5a3d-4c14-b9bc-8c7d38da68aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_1b11a8ae-1dcf-44e5-89a4-c5befb865d85" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_783b1d3c-5a3d-4c14-b9bc-8c7d38da68aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_StrategicTechnologyArrangementTechnologyAccessFeesMember_1cc3e0d4-ac69-4c94-9ccd-75f51fcc3ad8" xlink:href="lcid-20251231.xsd#lcid_StrategicTechnologyArrangementTechnologyAccessFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_783b1d3c-5a3d-4c14-b9bc-8c7d38da68aa" xlink:to="loc_lcid_StrategicTechnologyArrangementTechnologyAccessFeesMember_1cc3e0d4-ac69-4c94-9ccd-75f51fcc3ad8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_931c018a-20b8-4525-ac01-8edb2d39d605" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_146b7cdf-1cba-42c3-87d5-819bd6f77386" xlink:to="loc_us-gaap_FinancialInstrumentAxis_931c018a-20b8-4525-ac01-8edb2d39d605" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_931c018a-20b8-4525-ac01-8edb2d39d605_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_931c018a-20b8-4525-ac01-8edb2d39d605" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_931c018a-20b8-4525-ac01-8edb2d39d605_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7412fd31-4a26-42d3-b269-ba54d4ff12da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_931c018a-20b8-4525-ac01-8edb2d39d605" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7412fd31-4a26-42d3-b269-ba54d4ff12da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_549fd0e9-d293-4622-9c5d-c7feb73f3799" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7412fd31-4a26-42d3-b269-ba54d4ff12da" xlink:to="loc_us-gaap_EquitySecuritiesMember_549fd0e9-d293-4622-9c5d-c7feb73f3799" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_05bf8e56-24fb-43c9-bb88-eee1d58b0bc5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_146b7cdf-1cba-42c3-87d5-819bd6f77386" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_05bf8e56-24fb-43c9-bb88-eee1d58b0bc5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_05bf8e56-24fb-43c9-bb88-eee1d58b0bc5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_05bf8e56-24fb-43c9-bb88-eee1d58b0bc5" xlink:to="loc_us-gaap_RelatedPartyDomain_05bf8e56-24fb-43c9-bb88-eee1d58b0bc5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_73457cc6-35d2-478d-9656-218c96fe9019" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_05bf8e56-24fb-43c9-bb88-eee1d58b0bc5" xlink:to="loc_us-gaap_RelatedPartyDomain_73457cc6-35d2-478d-9656-218c96fe9019" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_44bbc2b4-567a-4bfe-80ee-ff7037391569" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_73457cc6-35d2-478d-9656-218c96fe9019" xlink:to="loc_us-gaap_RelatedPartyMember_44bbc2b4-567a-4bfe-80ee-ff7037391569" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss_25a7af0d-9d9f-4145-9a76-60802fba0b94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_70f3da26-8004-4434-9f8f-3a44ac59a19c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGainLoss_25a7af0d-9d9f-4145-9a76-60802fba0b94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss_c1ae104e-6285-4383-9698-92bd62389b34" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_70f3da26-8004-4434-9f8f-3a44ac59a19c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss_c1ae104e-6285-4383-9698-92bd62389b34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLossStatementOfFinancialPositionExtensibleList_935ccd70-8915-4268-b233-d93e2917b77a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLossStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_70f3da26-8004-4434-9f8f-3a44ac59a19c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLossStatementOfFinancialPositionExtensibleList_935ccd70-8915-4268-b233-d93e2917b77a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_cffe069b-9bcd-46f9-85df-4e17770cca73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_70f3da26-8004-4434-9f8f-3a44ac59a19c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_cffe069b-9bcd-46f9-85df-4e17770cca73" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionNumberOfSharesReceived_ec9a8664-a4a3-45f2-b41f-24e49af69513" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionNumberOfSharesReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_70f3da26-8004-4434-9f8f-3a44ac59a19c" xlink:to="loc_lcid_RelatedPartyTransactionNumberOfSharesReceived_ec9a8664-a4a3-45f2-b41f-24e49af69513" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionFairValueAmount_f7d12f73-d246-4c3a-9a3b-3630a68f15e0" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_70f3da26-8004-4434-9f8f-3a44ac59a19c" xlink:to="loc_lcid_RelatedPartyTransactionFairValueAmount_f7d12f73-d246-4c3a-9a3b-3630a68f15e0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_f50f91b3-7c15-43a1-bc06-b7681e26c779" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_70f3da26-8004-4434-9f8f-3a44ac59a19c" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_f50f91b3-7c15-43a1-bc06-b7681e26c779" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealizedAfterTax_93c115bc-9a5b-4742-9487-35a83ef3e2ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealizedAfterTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_70f3da26-8004-4434-9f8f-3a44ac59a19c" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealizedAfterTax_93c115bc-9a5b-4742-9487-35a83ef3e2ba" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSScheduleofReconciliationofCommonStockWarrantLiabilityMeasuredandRecordedatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSScheduleofReconciliationofCommonStockWarrantLiabilityMeasuredandRecordedatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/FAIRVALUEMEASUREMENTSANDFINANCIALINSTRUMENTSScheduleofReconciliationofCommonStockWarrantLiabilityMeasuredandRecordedatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_2957cab2-6973-4aff-9cdf-34e0fb647a45" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_f582464a-a22d-4d3b-8d0c-f96af1e03895" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_2957cab2-6973-4aff-9cdf-34e0fb647a45" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_f582464a-a22d-4d3b-8d0c-f96af1e03895" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_df7826fd-9b51-417a-8c48-7e15372d08c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_f582464a-a22d-4d3b-8d0c-f96af1e03895" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_df7826fd-9b51-417a-8c48-7e15372d08c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_df7826fd-9b51-417a-8c48-7e15372d08c7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_df7826fd-9b51-417a-8c48-7e15372d08c7" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_df7826fd-9b51-417a-8c48-7e15372d08c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_c3af3d3f-4ba9-46e2-b81e-cd3c9eb01cd9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_df7826fd-9b51-417a-8c48-7e15372d08c7" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_c3af3d3f-4ba9-46e2-b81e-cd3c9eb01cd9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_CommonStockWarrantLiabilityMember_8c2a25be-c9fe-4d35-af5f-252bcb8235b9" xlink:href="lcid-20251231.xsd#lcid_CommonStockWarrantLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_c3af3d3f-4ba9-46e2-b81e-cd3c9eb01cd9" xlink:to="loc_lcid_CommonStockWarrantLiabilityMember_8c2a25be-c9fe-4d35-af5f-252bcb8235b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember_47f9ea90-dea3-4a28-9005-ac673c0719c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_c3af3d3f-4ba9-46e2-b81e-cd3c9eb01cd9" xlink:to="loc_us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember_47f9ea90-dea3-4a28-9005-ac673c0719c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_fd200d05-5fb5-41b4-a891-69f26a42bbcb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTable_f582464a-a22d-4d3b-8d0c-f96af1e03895" xlink:to="loc_us-gaap_StatementClassOfStockAxis_fd200d05-5fb5-41b4-a891-69f26a42bbcb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_fd200d05-5fb5-41b4-a891-69f26a42bbcb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_fd200d05-5fb5-41b4-a891-69f26a42bbcb" xlink:to="loc_us-gaap_ClassOfStockDomain_fd200d05-5fb5-41b4-a891-69f26a42bbcb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_a7d41000-2884-4174-b983-229015eb7ce2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_fd200d05-5fb5-41b4-a891-69f26a42bbcb" xlink:to="loc_us-gaap_ClassOfStockDomain_a7d41000-2884-4174-b983-229015eb7ce2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_6f2e3a3d-6cc6-419d-95cf-b8aafab4bd53" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a7d41000-2884-4174-b983-229015eb7ce2" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_6f2e3a3d-6cc6-419d-95cf-b8aafab4bd53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_aaf8043a-52de-42e7-aaad-b395fbecee00" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a7d41000-2884-4174-b983-229015eb7ce2" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_aaf8043a-52de-42e7-aaad-b395fbecee00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_906a31cd-7e1a-462e-bc38-a02c0b95afe1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_2957cab2-6973-4aff-9cdf-34e0fb647a45" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_906a31cd-7e1a-462e-bc38-a02c0b95afe1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_b6da12c3-9a58-440a-9df3-e9de873dd378" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_906a31cd-7e1a-462e-bc38-a02c0b95afe1" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_b6da12c3-9a58-440a-9df3-e9de873dd378" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_595fb852-864b-4aec-984a-69b028611a84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_906a31cd-7e1a-462e-bc38-a02c0b95afe1" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_595fb852-864b-4aec-984a-69b028611a84" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues_318fca69-3cbe-40ef-9544-8b41244fba22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_906a31cd-7e1a-462e-bc38-a02c0b95afe1" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues_318fca69-3cbe-40ef-9544-8b41244fba22" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_42737c70-e3c1-4d6e-a565-8080cf6b8d39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBTScheduleofCarryingValueofDebtDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBTScheduleofCarryingValueofDebtDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBTScheduleofCarryingValueofDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019b11e8-c332-7b48-b63b-1034d25b5e30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019b11e8-c332-7af3-b7e8-4b8b851139a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b11e8-c332-7b48-b63b-1034d25b5e30" xlink:to="loc_us-gaap_DebtInstrumentTable_019b11e8-c332-7af3-b7e8-4b8b851139a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b11e8-c332-71aa-8d72-267d23919eb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019b11e8-c332-7af3-b7e8-4b8b851139a5" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b11e8-c332-71aa-8d72-267d23919eb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b11e8-c332-71aa-8d72-267d23919eb8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b11e8-c332-71aa-8d72-267d23919eb8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b11e8-c332-71aa-8d72-267d23919eb8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b11e8-c332-7398-afed-f370b9dee947" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b11e8-c332-71aa-8d72-267d23919eb8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b11e8-c332-7398-afed-f370b9dee947" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2026NotesMember_019b11e8-c332-7612-85e4-469e8fc2c4bb" xlink:href="lcid-20251231.xsd#lcid_A2026NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b11e8-c332-7398-afed-f370b9dee947" xlink:to="loc_lcid_A2026NotesMember_019b11e8-c332-7612-85e4-469e8fc2c4bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2030NotesMember_019b11e8-c332-7ff7-9948-a5d4548d0f2d" xlink:href="lcid-20251231.xsd#lcid_A2030NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b11e8-c332-7398-afed-f370b9dee947" xlink:to="loc_lcid_A2030NotesMember_019b11e8-c332-7ff7-9948-a5d4548d0f2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2031NotesMember_019b11e8-c332-7774-b097-498c03701050" xlink:href="lcid-20251231.xsd#lcid_A2031NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b11e8-c332-7398-afed-f370b9dee947" xlink:to="loc_lcid_A2031NotesMember_019b11e8-c332-7774-b097-498c03701050" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_GIBCreditFacilityMember_019b11e8-c332-73f1-8d74-c608a30a6cd4" xlink:href="lcid-20251231.xsd#lcid_GIBCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b11e8-c332-7398-afed-f370b9dee947" xlink:to="loc_lcid_GIBCreditFacilityMember_019b11e8-c332-73f1-8d74-c608a30a6cd4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019b11e8-c332-7e16-855a-aa7984e53726" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b11e8-c332-7b48-b63b-1034d25b5e30" xlink:to="loc_us-gaap_LongTermDebt_019b11e8-c332-7e16-855a-aa7984e53726" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019c8f92-3806-71dd-ac78-e2d23e2d13d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b11e8-c332-7b48-b63b-1034d25b5e30" xlink:to="loc_us-gaap_ShortTermBorrowings_019c8f92-3806-71dd-ac78-e2d23e2d13d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_019b11e8-c332-7c7f-bfcd-b0ba2bb6b8f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtLongtermAndShorttermCombinedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b11e8-c332-7b48-b63b-1034d25b5e30" xlink:to="loc_us-gaap_DebtLongtermAndShorttermCombinedAmount_019b11e8-c332-7c7f-bfcd-b0ba2bb6b8f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_019b11e8-c332-7976-99ce-c7c8cbfc4d14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b11e8-c332-7b48-b63b-1034d25b5e30" xlink:to="loc_us-gaap_LongTermDebtCurrent_019b11e8-c332-7976-99ce-c7c8cbfc4d14" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_019b11e8-c332-727b-8b6d-7a7a9be7398a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b11e8-c332-7b48-b63b-1034d25b5e30" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_019b11e8-c332-727b-8b6d-7a7a9be7398a" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBTScheduleofConvertibleNotesDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBTScheduleofConvertibleNotesDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBTScheduleofConvertibleNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionLineItems_dbb54f67-2910-406b-9a93-0d914c6af876" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionTable_1ef3a436-5945-4f1d-b826-b921438b1605" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_dbb54f67-2910-406b-9a93-0d914c6af876" xlink:to="loc_us-gaap_DebtInstrumentRedemptionTable_1ef3a436-5945-4f1d-b826-b921438b1605" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_442d4b53-fee9-4288-9957-82280ea84c4c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_1ef3a436-5945-4f1d-b826-b921438b1605" xlink:to="loc_us-gaap_DebtInstrumentAxis_442d4b53-fee9-4288-9957-82280ea84c4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_442d4b53-fee9-4288-9957-82280ea84c4c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_442d4b53-fee9-4288-9957-82280ea84c4c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_442d4b53-fee9-4288-9957-82280ea84c4c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_2275d79b-30c2-4fde-8693-f5038de2a9c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_442d4b53-fee9-4288-9957-82280ea84c4c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_2275d79b-30c2-4fde-8693-f5038de2a9c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2026NotesMember_b8c6e519-7442-4b7f-875e-24b34709c438" xlink:href="lcid-20251231.xsd#lcid_A2026NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_2275d79b-30c2-4fde-8693-f5038de2a9c5" xlink:to="loc_lcid_A2026NotesMember_b8c6e519-7442-4b7f-875e-24b34709c438" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2030NotesMember_019b11ef-1d34-7dbb-beb5-b257d9ee6b1d" xlink:href="lcid-20251231.xsd#lcid_A2030NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_2275d79b-30c2-4fde-8693-f5038de2a9c5" xlink:to="loc_lcid_A2030NotesMember_019b11ef-1d34-7dbb-beb5-b257d9ee6b1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2031NotesMember_019b11ef-1d34-75c0-bf30-a783d9b8a452" xlink:href="lcid-20251231.xsd#lcid_A2031NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_2275d79b-30c2-4fde-8693-f5038de2a9c5" xlink:to="loc_lcid_A2031NotesMember_019b11ef-1d34-75c0-bf30-a783d9b8a452" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1f11f946-d2c1-439e-adcb-6230e11b1457" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_1ef3a436-5945-4f1d-b826-b921438b1605" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1f11f946-d2c1-439e-adcb-6230e11b1457" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1f11f946-d2c1-439e-adcb-6230e11b1457_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1f11f946-d2c1-439e-adcb-6230e11b1457" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1f11f946-d2c1-439e-adcb-6230e11b1457_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_49d34b1e-93ab-4858-b932-cc854da659d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1f11f946-d2c1-439e-adcb-6230e11b1457" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_49d34b1e-93ab-4858-b932-cc854da659d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_43c283a4-c9b0-4217-a3e6-b7273093ab73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_49d34b1e-93ab-4858-b932-cc854da659d3" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_43c283a4-c9b0-4217-a3e6-b7273093ab73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_4f6d00d5-e028-436b-be15-0fe8a48aabfa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_dbb54f67-2910-406b-9a93-0d914c6af876" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_4f6d00d5-e028-436b-be15-0fe8a48aabfa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_84aac7a8-005b-4ce2-a4d4-cb6bbc20a6bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_dbb54f67-2910-406b-9a93-0d914c6af876" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_84aac7a8-005b-4ce2-a4d4-cb6bbc20a6bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebt_d51f3d76-1843-45cc-b3cc-177377590f9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_dbb54f67-2910-406b-9a93-0d914c6af876" xlink:to="loc_us-gaap_ConvertibleDebt_d51f3d76-1843-45cc-b3cc-177377590f9f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtFairValueDisclosures_531b3cff-19d2-4058-b4fd-dc5157f20f82" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtFairValueDisclosures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_dbb54f67-2910-406b-9a93-0d914c6af876" xlink:to="loc_us-gaap_ConvertibleDebtFairValueDisclosures_531b3cff-19d2-4058-b4fd-dc5157f20f82" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBTScheduleofComponentsofInterestExpenseDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBTScheduleofComponentsofInterestExpenseDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBTScheduleofComponentsofInterestExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionLineItems_893ca0b2-1540-4ffb-8f82-f179501b6ed3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionTable_fb9a5a8b-de8c-4fe0-afcc-ccc00a600fd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_893ca0b2-1540-4ffb-8f82-f179501b6ed3" xlink:to="loc_us-gaap_DebtInstrumentRedemptionTable_fb9a5a8b-de8c-4fe0-afcc-ccc00a600fd5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_6838812f-0e08-4153-bab0-a7760491c900" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_fb9a5a8b-de8c-4fe0-afcc-ccc00a600fd5" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_6838812f-0e08-4153-bab0-a7760491c900" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_6838812f-0e08-4153-bab0-a7760491c900_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_6838812f-0e08-4153-bab0-a7760491c900" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_6838812f-0e08-4153-bab0-a7760491c900_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_37966d67-f4a1-4a80-91d4-481705acdeaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_6838812f-0e08-4153-bab0-a7760491c900" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_37966d67-f4a1-4a80-91d4-481705acdeaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_f558c668-24a9-43fc-8ce4-61ca0b11464a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_37966d67-f4a1-4a80-91d4-481705acdeaa" xlink:to="loc_us-gaap_ConvertibleDebtMember_f558c668-24a9-43fc-8ce4-61ca0b11464a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebtExcludingAmortization_11126b85-a32d-4b8f-bf26-8345219453be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebtExcludingAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_893ca0b2-1540-4ffb-8f82-f179501b6ed3" xlink:to="loc_us-gaap_InterestExpenseDebtExcludingAmortization_11126b85-a32d-4b8f-bf26-8345219453be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019b11f4-3fb5-7248-957e-0c92572f7524" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_893ca0b2-1540-4ffb-8f82-f179501b6ed3" xlink:to="loc_us-gaap_AmortizationOfFinancingCostsAndDiscounts_019b11f4-3fb5-7248-957e-0c92572f7524" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_7611ddf5-2b8f-4c59-a850-fc4941532ed9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_893ca0b2-1540-4ffb-8f82-f179501b6ed3" xlink:to="loc_us-gaap_InterestExpenseDebt_7611ddf5-2b8f-4c59-a850-fc4941532ed9" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DebtNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019b11f3-8594-7bcc-b79e-e64aa01e16ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019b11f3-8594-7344-9c7e-21fb1e2e4837" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b11f3-8594-7bcc-b79e-e64aa01e16ca" xlink:to="loc_us-gaap_DebtInstrumentTable_019b11f3-8594-7344-9c7e-21fb1e2e4837" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b11f3-8594-714d-9db5-85393f5c4087" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019b11f3-8594-7344-9c7e-21fb1e2e4837" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b11f3-8594-714d-9db5-85393f5c4087" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b11f3-8594-714d-9db5-85393f5c4087_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b11f3-8594-714d-9db5-85393f5c4087" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b11f3-8594-714d-9db5-85393f5c4087_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b11f3-8594-7a07-8972-b039c9aa9712" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b11f3-8594-714d-9db5-85393f5c4087" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b11f3-8594-7a07-8972-b039c9aa9712" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2026NotesMember_019b11f3-8594-7704-96fb-898bd7487aba" xlink:href="lcid-20251231.xsd#lcid_A2026NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b11f3-8594-7a07-8972-b039c9aa9712" xlink:to="loc_lcid_A2026NotesMember_019b11f3-8594-7704-96fb-898bd7487aba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2030NotesMember_019b11f3-8594-7998-9d11-aa903989e532" xlink:href="lcid-20251231.xsd#lcid_A2030NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b11f3-8594-7a07-8972-b039c9aa9712" xlink:to="loc_lcid_A2030NotesMember_019b11f3-8594-7998-9d11-aa903989e532" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2031NotesMember_019b11f3-8594-78cb-973c-68ecef573aaf" xlink:href="lcid-20251231.xsd#lcid_A2031NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b11f3-8594-7a07-8972-b039c9aa9712" xlink:to="loc_lcid_A2031NotesMember_019b11f3-8594-78cb-973c-68ecef573aaf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019b11f3-8594-7b6b-a863-beeb7b6b9505" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019b11f3-8594-7344-9c7e-21fb1e2e4837" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019b11f3-8594-7b6b-a863-beeb7b6b9505" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b11f3-8594-7b6b-a863-beeb7b6b9505_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b11f3-8594-7b6b-a863-beeb7b6b9505" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b11f3-8594-7b6b-a863-beeb7b6b9505_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b11f3-8594-7ab6-8520-789b9cbe0822" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b11f3-8594-7b6b-a863-beeb7b6b9505" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b11f3-8594-7ab6-8520-789b9cbe0822" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019b11f3-8594-7480-93e6-08de414ec2fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b11f3-8594-7ab6-8520-789b9cbe0822" xlink:to="loc_us-gaap_ConvertibleDebtMember_019b11f3-8594-7480-93e6-08de414ec2fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019b11f3-8594-7602-879b-954f939f829d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b11f3-8594-7bcc-b79e-e64aa01e16ca" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_019b11f3-8594-7602-879b-954f939f829d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBT2030NotesDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBT2030NotesDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBT2030NotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionTable_019b1208-bcde-7d6b-9d0c-089f5891b964" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_DebtInstrumentRedemptionTable_019b1208-bcde-7d6b-9d0c-089f5891b964" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b1208-bcde-7085-88ad-05295849dac5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b1208-bcde-7d6b-9d0c-089f5891b964" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b1208-bcde-7085-88ad-05295849dac5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b1208-bcde-7085-88ad-05295849dac5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b1208-bcde-7085-88ad-05295849dac5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b1208-bcde-7085-88ad-05295849dac5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b1208-bcde-7259-9973-db6c49215b48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b1208-bcde-7085-88ad-05295849dac5" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b1208-bcde-7259-9973-db6c49215b48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2030NotesMember_019b1208-bcde-794f-8c04-f8ee6a80d838" xlink:href="lcid-20251231.xsd#lcid_A2030NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1208-bcde-7259-9973-db6c49215b48" xlink:to="loc_lcid_A2030NotesMember_019b1208-bcde-794f-8c04-f8ee6a80d838" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019b1208-bcde-7f94-b84c-716fc7b221fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b1208-bcde-7d6b-9d0c-089f5891b964" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019b1208-bcde-7f94-b84c-716fc7b221fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b1208-bcde-7f94-b84c-716fc7b221fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b1208-bcde-7f94-b84c-716fc7b221fb" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b1208-bcde-7f94-b84c-716fc7b221fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b1208-bcde-7bd2-a28e-cc290b1604ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b1208-bcde-7f94-b84c-716fc7b221fb" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b1208-bcde-7bd2-a28e-cc290b1604ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019b1208-bcde-7faf-b1d6-956260776f7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b1208-bcde-7bd2-a28e-cc290b1604ff" xlink:to="loc_us-gaap_ConvertibleDebtMember_019b1208-bcde-7faf-b1d6-956260776f7a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b1209-30e2-706d-8eee-e84adaebf75d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b1208-bcde-7d6b-9d0c-089f5891b964" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b1209-30e2-706d-8eee-e84adaebf75d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1209-30e2-706d-8eee-e84adaebf75d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b1209-30e2-706d-8eee-e84adaebf75d" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1209-30e2-706d-8eee-e84adaebf75d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1209-30e2-75d8-8950-75a56566804d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b1209-30e2-706d-8eee-e84adaebf75d" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1209-30e2-75d8-8950-75a56566804d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019b1209-30e2-77ae-8a2f-392fbc135f89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1209-30e2-75d8-8950-75a56566804d" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019b1209-30e2-77ae-8a2f-392fbc135f89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019b1209-30e2-7f23-92a5-b5938d6e1459" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1209-30e2-75d8-8950-75a56566804d" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019b1209-30e2-7f23-92a5-b5938d6e1459" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019b1208-bcde-7e93-b4c9-399ac53b6db2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019b1208-bcde-7e93-b4c9-399ac53b6db2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019b1208-bcde-7a52-90f5-16058c4a9c99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019b1208-bcde-7a52-90f5-16058c4a9c99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DebtInstrumentIssuancePricePercentageOfPrincipalAmount_019b1208-bcde-7ffd-8e44-6efb57ffa510" xlink:href="lcid-20251231.xsd#lcid_DebtInstrumentIssuancePricePercentageOfPrincipalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_lcid_DebtInstrumentIssuancePricePercentageOfPrincipalAmount_019b1208-bcde-7ffd-8e44-6efb57ffa510" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019b1208-bcde-74a6-98a7-8306de71e568" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019b1208-bcde-74a6-98a7-8306de71e568" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_019b1208-bcde-7fca-97d9-cd93bf20bbe0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRepurchasedFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_019b1208-bcde-7fca-97d9-cd93bf20bbe0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ProceedsFromConvertibleDebtUsedForRepurchase_019b1208-bcde-728e-8890-8325f858dca6" xlink:href="lcid-20251231.xsd#lcid_ProceedsFromConvertibleDebtUsedForRepurchase"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_lcid_ProceedsFromConvertibleDebtUsedForRepurchase_019b1208-bcde-728e-8890-8325f858dca6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019b120c-334d-71e4-a4b6-02b846f81f2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019b120c-334d-71e4-a4b6-02b846f81f2e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019b1208-bcde-763b-9c07-0b7169b5aac7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019b1208-bcde-763b-9c07-0b7169b5aac7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019b1208-bcde-7f12-a467-fa7169102fc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019b1208-bcde-7f12-a467-fa7169102fc7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019b1208-bcde-7db2-bb08-4239d4d09a41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019b1208-bcde-7db2-bb08-4239d4d09a41" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019b1208-bcde-7461-96d9-2e9eb8efa7c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019b1208-bcde-7461-96d9-2e9eb8efa7c2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019b1209-30e2-7353-98e7-2a840ffd72fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019b1209-30e2-7353-98e7-2a840ffd72fa" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DebtInstrumentConvertibleRedemptionPeriodNumberOfConsecutiveBusinessDays_019b1209-30e2-71fc-bcb8-db337b75b56d" xlink:href="lcid-20251231.xsd#lcid_DebtInstrumentConvertibleRedemptionPeriodNumberOfConsecutiveBusinessDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1208-bcde-7c48-ad1f-3be80106404d" xlink:to="loc_lcid_DebtInstrumentConvertibleRedemptionPeriodNumberOfConsecutiveBusinessDays_019b1209-30e2-71fc-bcb8-db337b75b56d" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBT2031NotesDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBT2031NotesDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBT2031NotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionTable_019b11fc-3004-7d6a-ba00-ed663f3fc279" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_DebtInstrumentRedemptionTable_019b11fc-3004-7d6a-ba00-ed663f3fc279" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b11fc-3004-7439-a71c-a891ce3b8e8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b11fc-3004-7d6a-ba00-ed663f3fc279" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b11fc-3004-7439-a71c-a891ce3b8e8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b11fc-3004-7439-a71c-a891ce3b8e8d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b11fc-3004-7439-a71c-a891ce3b8e8d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b11fc-3004-7439-a71c-a891ce3b8e8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b11fc-3004-7f21-9d7e-d2da8e51b927" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b11fc-3004-7439-a71c-a891ce3b8e8d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b11fc-3004-7f21-9d7e-d2da8e51b927" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2031NotesMember_019b11fc-3004-7a9e-bcb8-1d7e2599f8cf" xlink:href="lcid-20251231.xsd#lcid_A2031NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b11fc-3004-7f21-9d7e-d2da8e51b927" xlink:to="loc_lcid_A2031NotesMember_019b11fc-3004-7a9e-bcb8-1d7e2599f8cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2026NotesMember_019b11fc-3004-7513-8768-e147d7b7f83d" xlink:href="lcid-20251231.xsd#lcid_A2026NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b11fc-3004-7f21-9d7e-d2da8e51b927" xlink:to="loc_lcid_A2026NotesMember_019b11fc-3004-7513-8768-e147d7b7f83d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019b11fc-3004-7c81-8cfd-f4701f8c6021" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b11fc-3004-7d6a-ba00-ed663f3fc279" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019b11fc-3004-7c81-8cfd-f4701f8c6021" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b11fc-3004-7c81-8cfd-f4701f8c6021_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b11fc-3004-7c81-8cfd-f4701f8c6021" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b11fc-3004-7c81-8cfd-f4701f8c6021_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b11fc-3004-7a53-8bc5-c832db1d9f74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b11fc-3004-7c81-8cfd-f4701f8c6021" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b11fc-3004-7a53-8bc5-c832db1d9f74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019b11fc-3004-767c-ba73-d3e988fb4cf4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b11fc-3004-7a53-8bc5-c832db1d9f74" xlink:to="loc_us-gaap_ConvertibleDebtMember_019b11fc-3004-767c-ba73-d3e988fb4cf4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b11fc-7372-710b-a200-c4d28fbce6d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b11fc-3004-7d6a-ba00-ed663f3fc279" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b11fc-7372-710b-a200-c4d28fbce6d6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b11fc-7372-710b-a200-c4d28fbce6d6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b11fc-7372-710b-a200-c4d28fbce6d6" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b11fc-7372-710b-a200-c4d28fbce6d6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b11fc-7372-7f98-b76c-e3d90f2f0876" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b11fc-7372-710b-a200-c4d28fbce6d6" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b11fc-7372-7f98-b76c-e3d90f2f0876" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019b11fc-7372-7b7e-8f2d-e219eeb8cc75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b11fc-7372-7f98-b76c-e3d90f2f0876" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019b11fc-7372-7b7e-8f2d-e219eeb8cc75" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019b11fc-7372-7c15-8908-0f092838c05a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b11fc-7372-7f98-b76c-e3d90f2f0876" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019b11fc-7372-7c15-8908-0f092838c05a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019b11fc-3004-7c7f-90d3-cba909c63774" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019b11fc-3004-7c7f-90d3-cba909c63774" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019b11fc-3004-78a9-a8a8-ceacc1e36e30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019b11fc-3004-78a9-a8a8-ceacc1e36e30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DebtInstrumentIssuancePricePercentageOfPrincipalAmount_019b11fc-3004-7301-9ee8-2420ef74ce59" xlink:href="lcid-20251231.xsd#lcid_DebtInstrumentIssuancePricePercentageOfPrincipalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_lcid_DebtInstrumentIssuancePricePercentageOfPrincipalAmount_019b11fc-3004-7301-9ee8-2420ef74ce59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019b11fc-3004-7f86-931d-7160e5de82a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019b11fc-3004-7f86-931d-7160e5de82a5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_019b11fc-3004-7ac8-af48-cbfa0642c1df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRepurchasedFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_019b11fc-3004-7ac8-af48-cbfa0642c1df" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ProceedsFromConvertibleDebtUsedForRepurchase_019b11fc-3004-7584-a534-cde06a519776" xlink:href="lcid-20251231.xsd#lcid_ProceedsFromConvertibleDebtUsedForRepurchase"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_lcid_ProceedsFromConvertibleDebtUsedForRepurchase_019b11fc-3004-7584-a534-cde06a519776" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019b1200-e2dd-72ad-9ce3-0c60f48c749f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019b1200-e2dd-72ad-9ce3-0c60f48c749f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019b11fc-7372-7982-9e1c-3a6b47610d84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019b11fc-7372-7982-9e1c-3a6b47610d84" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019b11fc-7372-7218-81d7-389f4b22f8d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019b11fc-7372-7218-81d7-389f4b22f8d9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019b11fc-7372-7b0e-8ac0-0893106d6f95" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019b11fc-7372-7b0e-8ac0-0893106d6f95" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019b11fc-7372-7025-8882-dc8561a0c6a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019b11fc-7372-7025-8882-dc8561a0c6a5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019b11fc-7372-788c-80f0-8437d84bc3fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019b11fc-7372-788c-80f0-8437d84bc3fc" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DebtInstrumentConvertibleRedemptionPeriodNumberOfConsecutiveBusinessDays_019b11fc-7372-71aa-9b10-c9502912b15e" xlink:href="lcid-20251231.xsd#lcid_DebtInstrumentConvertibleRedemptionPeriodNumberOfConsecutiveBusinessDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b11fc-3004-7243-8ea9-65142d086d3e" xlink:to="loc_lcid_DebtInstrumentConvertibleRedemptionPeriodNumberOfConsecutiveBusinessDays_019b11fc-7372-71aa-9b10-c9502912b15e" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBTCappedCallTransactionsDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBTCappedCallTransactionsDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBTCappedCallTransactionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019b120a-76eb-76e3-9df1-6175fc52eaea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019b120a-76eb-7c38-acc0-622abab4d2d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b120a-76eb-76e3-9df1-6175fc52eaea" xlink:to="loc_us-gaap_DebtInstrumentTable_019b120a-76eb-7c38-acc0-622abab4d2d4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b120a-76eb-7422-bbf7-c89755b6638c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019b120a-76eb-7c38-acc0-622abab4d2d4" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b120a-76eb-7422-bbf7-c89755b6638c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b120a-76eb-7422-bbf7-c89755b6638c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b120a-76eb-7422-bbf7-c89755b6638c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b120a-76eb-7422-bbf7-c89755b6638c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b120a-76eb-7b4d-913c-761dacad4ed9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b120a-76eb-7422-bbf7-c89755b6638c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b120a-76eb-7b4d-913c-761dacad4ed9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2030NotesMember_019b120a-76eb-7760-9c4e-0f7f88407364" xlink:href="lcid-20251231.xsd#lcid_A2030NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b120a-76eb-7b4d-913c-761dacad4ed9" xlink:to="loc_lcid_A2030NotesMember_019b120a-76eb-7760-9c4e-0f7f88407364" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_019b120a-76eb-7733-b22c-2a221d5be209" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OptionIndexedToIssuersEquityEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019b120a-76eb-7c38-acc0-622abab4d2d4" xlink:to="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_019b120a-76eb-7733-b22c-2a221d5be209" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_019b120a-76eb-7733-b22c-2a221d5be209_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OptionIndexedToIssuersEquityTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_019b120a-76eb-7733-b22c-2a221d5be209" xlink:to="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_019b120a-76eb-7733-b22c-2a221d5be209_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_019b120a-76eb-7507-945e-0a85f4208e27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OptionIndexedToIssuersEquityTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OptionIndexedToIssuersEquityEquityAxis_019b120a-76eb-7733-b22c-2a221d5be209" xlink:to="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_019b120a-76eb-7507-945e-0a85f4208e27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CallOptionMember_019b120a-76eb-7f00-a624-aa02ee147d3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CallOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OptionIndexedToIssuersEquityTypeDomain_019b120a-76eb-7507-945e-0a85f4208e27" xlink:to="loc_us-gaap_CallOptionMember_019b120a-76eb-7f00-a624-aa02ee147d3e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PaymentForPurchasedCappedCallTransactions_019b120a-76eb-767e-a892-ec9b881a6156" xlink:href="lcid-20251231.xsd#lcid_PaymentForPurchasedCappedCallTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b120a-76eb-76e3-9df1-6175fc52eaea" xlink:to="loc_lcid_PaymentForPurchasedCappedCallTransactions_019b120a-76eb-767e-a892-ec9b881a6156" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DebtInstrumentStrikePrice_019b120a-76eb-786c-bb1f-647ba08b379c" xlink:href="lcid-20251231.xsd#lcid_DebtInstrumentStrikePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b120a-76eb-76e3-9df1-6175fc52eaea" xlink:to="loc_lcid_DebtInstrumentStrikePrice_019b120a-76eb-786c-bb1f-647ba08b379c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DebtInstrumentCapPrice_019b120a-76eb-7b02-af8f-fb6eda293523" xlink:href="lcid-20251231.xsd#lcid_DebtInstrumentCapPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b120a-76eb-76e3-9df1-6175fc52eaea" xlink:to="loc_lcid_DebtInstrumentCapPrice_019b120a-76eb-7b02-af8f-fb6eda293523" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBTAyarPrepaidForwardTransactionDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBTAyarPrepaidForwardTransactionDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBTAyarPrepaidForwardTransactionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1210-3aa7-764d-b9b4-b9a32a3a7d46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionTable_019b1210-3aa7-722e-981c-dcea87efe04c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1210-3aa7-764d-b9b4-b9a32a3a7d46" xlink:to="loc_us-gaap_DebtInstrumentRedemptionTable_019b1210-3aa7-722e-981c-dcea87efe04c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019b1210-3aa7-7bfe-b03f-187365714145" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b1210-3aa7-722e-981c-dcea87efe04c" xlink:to="loc_srt_CounterpartyNameAxis_019b1210-3aa7-7bfe-b03f-187365714145" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1210-3aa7-7bfe-b03f-187365714145_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019b1210-3aa7-7bfe-b03f-187365714145" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1210-3aa7-7bfe-b03f-187365714145_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1210-3aa7-71d7-99bb-6a425745998c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019b1210-3aa7-7bfe-b03f-187365714145" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1210-3aa7-71d7-99bb-6a425745998c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ForwardCounterpartyMember_019b1210-3aa7-720c-85ab-2f34d1fda2fc" xlink:href="lcid-20251231.xsd#lcid_ForwardCounterpartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1210-3aa7-71d7-99bb-6a425745998c" xlink:to="loc_lcid_ForwardCounterpartyMember_019b1210-3aa7-720c-85ab-2f34d1fda2fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AyarThirdInvestmentCompanyMember_019b1210-3aa7-7f1b-98fa-3624295ab02e" xlink:href="lcid-20251231.xsd#lcid_AyarThirdInvestmentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b1210-3aa7-71d7-99bb-6a425745998c" xlink:to="loc_lcid_AyarThirdInvestmentCompanyMember_019b1210-3aa7-7f1b-98fa-3624295ab02e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019b1210-3aa7-7f9e-9aee-a82accd2dbd9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b1210-3aa7-722e-981c-dcea87efe04c" xlink:to="loc_srt_StatementScenarioAxis_019b1210-3aa7-7f9e-9aee-a82accd2dbd9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019b1210-3aa7-7f9e-9aee-a82accd2dbd9_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019b1210-3aa7-7f9e-9aee-a82accd2dbd9" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019b1210-3aa7-7f9e-9aee-a82accd2dbd9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019b1210-3aa7-73fe-9dce-3e08f86c82d2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019b1210-3aa7-7f9e-9aee-a82accd2dbd9" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019b1210-3aa7-73fe-9dce-3e08f86c82d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_019b1210-3aa7-74e8-9f08-b5c5afe6a1d5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019b1210-3aa7-73fe-9dce-3e08f86c82d2" xlink:to="loc_srt_ScenarioForecastMember_019b1210-3aa7-74e8-9f08-b5c5afe6a1d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b1210-3aa7-7d66-876f-f204de12c1dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b1210-3aa7-722e-981c-dcea87efe04c" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b1210-3aa7-7d66-876f-f204de12c1dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b1210-3aa7-7d66-876f-f204de12c1dc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b1210-3aa7-7d66-876f-f204de12c1dc" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b1210-3aa7-7d66-876f-f204de12c1dc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b1210-3aa7-7dc5-af5f-c213bc5022e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b1210-3aa7-7d66-876f-f204de12c1dc" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b1210-3aa7-7dc5-af5f-c213bc5022e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ConvertibleSeniorNotesDue2030Member_019b1210-3aa7-7419-a0e8-5a0f1146f895" xlink:href="lcid-20251231.xsd#lcid_ConvertibleSeniorNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1210-3aa7-7dc5-af5f-c213bc5022e6" xlink:to="loc_lcid_ConvertibleSeniorNotesDue2030Member_019b1210-3aa7-7419-a0e8-5a0f1146f895" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ConvertibleSeniorNotesDue2031Member_019b1210-3aa7-75fe-8f71-c6f51cbdef75" xlink:href="lcid-20251231.xsd#lcid_ConvertibleSeniorNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1210-3aa7-7dc5-af5f-c213bc5022e6" xlink:to="loc_lcid_ConvertibleSeniorNotesDue2031Member_019b1210-3aa7-75fe-8f71-c6f51cbdef75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019b1210-3aa7-7ceb-acb6-a5bf3416a3eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b1210-3aa7-722e-981c-dcea87efe04c" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019b1210-3aa7-7ceb-acb6-a5bf3416a3eb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b1210-3aa7-7ceb-acb6-a5bf3416a3eb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b1210-3aa7-7ceb-acb6-a5bf3416a3eb" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b1210-3aa7-7ceb-acb6-a5bf3416a3eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b1210-3aa7-7940-b416-ad60ebf08445" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b1210-3aa7-7ceb-acb6-a5bf3416a3eb" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b1210-3aa7-7940-b416-ad60ebf08445" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019b1210-3aa7-7e08-8b72-f6a2ac1cf2f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b1210-3aa7-7940-b416-ad60ebf08445" xlink:to="loc_us-gaap_ConvertibleDebtMember_019b1210-3aa7-7e08-8b72-f6a2ac1cf2f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019b1210-3aa7-73d2-be9f-92420bf67ca6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019b1210-3aa7-722e-981c-dcea87efe04c" xlink:to="loc_dei_LegalEntityAxis_019b1210-3aa7-73d2-be9f-92420bf67ca6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019b1210-3aa7-73d2-be9f-92420bf67ca6_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019b1210-3aa7-73d2-be9f-92420bf67ca6" xlink:to="loc_dei_EntityDomain_019b1210-3aa7-73d2-be9f-92420bf67ca6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019b1210-3aa7-7362-9e69-06110a01c88a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019b1210-3aa7-73d2-be9f-92420bf67ca6" xlink:to="loc_dei_EntityDomain_019b1210-3aa7-7362-9e69-06110a01c88a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AyarThirdInvestmentCompanyMember_019b1210-3aa7-75cf-a886-6674e4c45dc6" xlink:href="lcid-20251231.xsd#lcid_AyarThirdInvestmentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019b1210-3aa7-7362-9e69-06110a01c88a" xlink:to="loc_lcid_AyarThirdInvestmentCompanyMember_019b1210-3aa7-75cf-a886-6674e4c45dc6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PrepaidForwardTransaction_019b1210-3aa7-7d08-b1e1-549cf7e08b8f" xlink:href="lcid-20251231.xsd#lcid_PrepaidForwardTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1210-3aa7-764d-b9b4-b9a32a3a7d46" xlink:to="loc_lcid_PrepaidForwardTransaction_019b1210-3aa7-7d08-b1e1-549cf7e08b8f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PrepaidForwardTransactionCashFeeAccrualRate_019b1210-3aa7-78e7-b608-a7bbbec55297" xlink:href="lcid-20251231.xsd#lcid_PrepaidForwardTransactionCashFeeAccrualRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019b1210-3aa7-764d-b9b4-b9a32a3a7d46" xlink:to="loc_lcid_PrepaidForwardTransactionCashFeeAccrualRate_019b1210-3aa7-78e7-b608-a7bbbec55297" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBT2026NotesDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBT2026NotesDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBT2026NotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_b205516b-14b3-4b9b-8002-c7a36955f495" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_DebtInstrumentTable_b205516b-14b3-4b9b-8002-c7a36955f495" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b1252-dc6e-76ed-9abe-fc17b17f9fc1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b205516b-14b3-4b9b-8002-c7a36955f495" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b1252-dc6e-76ed-9abe-fc17b17f9fc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b1252-dc6e-76ed-9abe-fc17b17f9fc1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b1252-dc6e-76ed-9abe-fc17b17f9fc1" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b1252-dc6e-76ed-9abe-fc17b17f9fc1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b1252-dc6e-7896-967b-5d824bc0bace" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b1252-dc6e-76ed-9abe-fc17b17f9fc1" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b1252-dc6e-7896-967b-5d824bc0bace" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2026NotesMember_019b1252-dc6e-7bb2-ab0d-29eb34d6b66e" xlink:href="lcid-20251231.xsd#lcid_A2026NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1252-dc6e-7896-967b-5d824bc0bace" xlink:to="loc_lcid_A2026NotesMember_019b1252-dc6e-7bb2-ab0d-29eb34d6b66e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2031NotesMember_019b1252-dc6e-7ee2-8d16-b0e65510a783" xlink:href="lcid-20251231.xsd#lcid_A2031NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b1252-dc6e-7896-967b-5d824bc0bace" xlink:to="loc_lcid_A2031NotesMember_019b1252-dc6e-7ee2-8d16-b0e65510a783" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019b1252-dc6e-713c-a761-24edd45e5290" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b205516b-14b3-4b9b-8002-c7a36955f495" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019b1252-dc6e-713c-a761-24edd45e5290" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b1252-dc6e-713c-a761-24edd45e5290_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b1252-dc6e-713c-a761-24edd45e5290" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b1252-dc6e-713c-a761-24edd45e5290_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b1252-dc6e-7969-98b8-177c7909bf94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b1252-dc6e-713c-a761-24edd45e5290" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b1252-dc6e-7969-98b8-177c7909bf94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019b1252-dc6e-730f-a978-db636cec5837" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b1252-dc6e-7969-98b8-177c7909bf94" xlink:to="loc_us-gaap_ConvertibleDebtMember_019b1252-dc6e-730f-a978-db636cec5837" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b1252-dc6e-7488-9bcb-fc693b8c46e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b205516b-14b3-4b9b-8002-c7a36955f495" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b1252-dc6e-7488-9bcb-fc693b8c46e9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1252-dc6e-7488-9bcb-fc693b8c46e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b1252-dc6e-7488-9bcb-fc693b8c46e9" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1252-dc6e-7488-9bcb-fc693b8c46e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1252-dc6e-7a7e-8521-16497acc6867" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019b1252-dc6e-7488-9bcb-fc693b8c46e9" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1252-dc6e-7a7e-8521-16497acc6867" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019b1252-dc6e-7e4d-8d33-df7fcbc3cf34" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1252-dc6e-7a7e-8521-16497acc6867" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019b1252-dc6e-7e4d-8d33-df7fcbc3cf34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019b1252-dc6e-737a-9a25-ba23f3b21369" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019b1252-dc6e-7a7e-8521-16497acc6867" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019b1252-dc6e-737a-9a25-ba23f3b21369" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019b1252-dc6e-74a6-8686-74029fe95880" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019b1252-dc6e-74a6-8686-74029fe95880" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019b1252-dc6e-78a1-bce7-60fa1e31917e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019b1252-dc6e-78a1-bce7-60fa1e31917e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DebtInstrumentIssuancePricePercentageOfPrincipalAmount_019b1252-dc6e-7790-ab6d-1b1200e420d4" xlink:href="lcid-20251231.xsd#lcid_DebtInstrumentIssuancePricePercentageOfPrincipalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_lcid_DebtInstrumentIssuancePricePercentageOfPrincipalAmount_019b1252-dc6e-7790-ab6d-1b1200e420d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromConvertibleDebt_019b1252-dc6e-7956-a312-fe2d7da830a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromConvertibleDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_ProceedsFromConvertibleDebt_019b1252-dc6e-7956-a312-fe2d7da830a2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019b1252-dc6e-7bf1-8132-f4bdee91e699" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_019b1252-dc6e-7bf1-8132-f4bdee91e699" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019b1252-dc6e-722f-90d0-d2cac50a61c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_019b1252-dc6e-722f-90d0-d2cac50a61c6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019b1252-dc6e-752c-860f-69eddaa15b9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_019b1252-dc6e-752c-860f-69eddaa15b9a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019b1252-dc6e-7bbd-9b19-8ffa41518609" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_019b1252-dc6e-7bbd-9b19-8ffa41518609" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019b1252-dc6e-7720-aabf-e6b19c5a0b3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_019b1252-dc6e-7720-aabf-e6b19c5a0b3c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DebtInstrumentConvertibleRedemptionPeriodNumberOfConsecutiveBusinessDays_019b1252-dc6e-7486-bbe6-933c0af1d615" xlink:href="lcid-20251231.xsd#lcid_DebtInstrumentConvertibleRedemptionPeriodNumberOfConsecutiveBusinessDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_lcid_DebtInstrumentConvertibleRedemptionPeriodNumberOfConsecutiveBusinessDays_019b1252-dc6e-7486-bbe6-933c0af1d615" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_019b1252-dc6e-7d8b-8429-269eb6a251fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRepurchasedFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_DebtInstrumentRepurchasedFaceAmount_019b1252-dc6e-7d8b-8429-269eb6a251fa" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ProceedsFromConvertibleDebtUsedForRepurchase_019b1252-dc6e-79b7-86d0-51c8097023d5" xlink:href="lcid-20251231.xsd#lcid_ProceedsFromConvertibleDebtUsedForRepurchase"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_lcid_ProceedsFromConvertibleDebtUsedForRepurchase_019b1252-dc6e-79b7-86d0-51c8097023d5" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019b1254-7711-7e4f-855e-a2331b052e12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019b1254-7711-7e4f-855e-a2331b052e12" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019b1252-dc6e-719e-b84e-3661379a642d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019b1252-dc6e-719e-b84e-3661379a642d" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019b1252-dc6e-7ad0-8d26-dc989b99d3e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019b1252-dc6e-7241-a797-9183b6d3d243" xlink:to="loc_us-gaap_LongTermDebt_019b1252-dc6e-7ad0-8d26-dc989b99d3e3" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBTSIDFLoanAgreementDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBTSIDFLoanAgreementDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBTSIDFLoanAgreementDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_10085a8f-dacf-48a5-8213-cf8cbe6f8074" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_ba8e522e-07a6-4275-93ac-e2a290299e02" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_10085a8f-dacf-48a5-8213-cf8cbe6f8074" xlink:to="loc_us-gaap_DebtInstrumentTable_ba8e522e-07a6-4275-93ac-e2a290299e02" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_2e34c09d-452c-4e14-bd8f-efd25b30aaee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ba8e522e-07a6-4275-93ac-e2a290299e02" xlink:to="loc_us-gaap_DebtInstrumentAxis_2e34c09d-452c-4e14-bd8f-efd25b30aaee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_2e34c09d-452c-4e14-bd8f-efd25b30aaee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_2e34c09d-452c-4e14-bd8f-efd25b30aaee" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_2e34c09d-452c-4e14-bd8f-efd25b30aaee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b56c70a2-a29e-4c46-b58d-694ea89ecdcf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_2e34c09d-452c-4e14-bd8f-efd25b30aaee" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b56c70a2-a29e-4c46-b58d-694ea89ecdcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaudiIndustrialDevelopmentFundLoanAgreementMember_a641e5d3-1dd3-47d2-8bfd-c8c7a0530f02" xlink:href="lcid-20251231.xsd#lcid_SaudiIndustrialDevelopmentFundLoanAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b56c70a2-a29e-4c46-b58d-694ea89ecdcf" xlink:to="loc_lcid_SaudiIndustrialDevelopmentFundLoanAgreementMember_a641e5d3-1dd3-47d2-8bfd-c8c7a0530f02" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_91fe516a-b363-43f2-ac42-456d15d10f4f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ba8e522e-07a6-4275-93ac-e2a290299e02" xlink:to="loc_srt_RangeAxis_91fe516a-b363-43f2-ac42-456d15d10f4f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_91fe516a-b363-43f2-ac42-456d15d10f4f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_91fe516a-b363-43f2-ac42-456d15d10f4f" xlink:to="loc_srt_RangeMember_91fe516a-b363-43f2-ac42-456d15d10f4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_b522bb96-afab-47f8-bcfd-1557237e4cb5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_91fe516a-b363-43f2-ac42-456d15d10f4f" xlink:to="loc_srt_RangeMember_b522bb96-afab-47f8-bcfd-1557237e4cb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_c3f9da64-a683-4e48-8e3c-3ac27c57f42a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_b522bb96-afab-47f8-bcfd-1557237e4cb5" xlink:to="loc_srt_MinimumMember_c3f9da64-a683-4e48-8e3c-3ac27c57f42a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_0034fa93-83d8-41d9-8e1d-9df710a99925" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_b522bb96-afab-47f8-bcfd-1557237e4cb5" xlink:to="loc_srt_MaximumMember_0034fa93-83d8-41d9-8e1d-9df710a99925" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_9cd37c9e-2852-4311-b440-15d0e542e4c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_10085a8f-dacf-48a5-8213-cf8cbe6f8074" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_9cd37c9e-2852-4311-b440-15d0e542e4c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_6d40b1fd-2afe-4254-aa20-8fb40e05bb0f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentPeriodicPaymentPrincipal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_10085a8f-dacf-48a5-8213-cf8cbe6f8074" xlink:to="loc_us-gaap_DebtInstrumentPeriodicPaymentPrincipal_6d40b1fd-2afe-4254-aa20-8fb40e05bb0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFeeAmount_4905087b-9049-4d9d-a544-aff9f8b82beb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFeeAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_10085a8f-dacf-48a5-8213-cf8cbe6f8074" xlink:to="loc_us-gaap_DebtInstrumentFeeAmount_4905087b-9049-4d9d-a544-aff9f8b82beb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_63998be6-5520-4d1e-af0b-6151b1098ea2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_10085a8f-dacf-48a5-8213-cf8cbe6f8074" xlink:to="loc_us-gaap_LongTermDebt_63998be6-5520-4d1e-af0b-6151b1098ea2" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBTGIBFacilityAgreementDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBTGIBFacilityAgreementDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBTGIBFacilityAgreementDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_9e377843-b121-4b27-bebc-efacf14b488c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_us-gaap_DebtInstrumentTable_9e377843-b121-4b27-bebc-efacf14b488c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_215e467e-3855-4b10-a0a3-b7ffb0abb620" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9e377843-b121-4b27-bebc-efacf14b488c" xlink:to="loc_us-gaap_CreditFacilityAxis_215e467e-3855-4b10-a0a3-b7ffb0abb620" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_215e467e-3855-4b10-a0a3-b7ffb0abb620_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_215e467e-3855-4b10-a0a3-b7ffb0abb620" xlink:to="loc_us-gaap_CreditFacilityDomain_215e467e-3855-4b10-a0a3-b7ffb0abb620_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_179da2b1-75f7-4a07-84f2-349bb8c6c48b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_215e467e-3855-4b10-a0a3-b7ffb0abb620" xlink:to="loc_us-gaap_CreditFacilityDomain_179da2b1-75f7-4a07-84f2-349bb8c6c48b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_f5f0c8bf-254b-43bf-89f7-e7501151e99d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_179da2b1-75f7-4a07-84f2-349bb8c6c48b" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_f5f0c8bf-254b-43bf-89f7-e7501151e99d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BridgeLoanMember_9ed92877-0eb1-40b7-b241-3d4e607eb8be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BridgeLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_179da2b1-75f7-4a07-84f2-349bb8c6c48b" xlink:to="loc_us-gaap_BridgeLoanMember_9ed92877-0eb1-40b7-b241-3d4e607eb8be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_WorkingCapitalFacilityMember_1ab50229-e147-46d4-a42b-b2d9b78c927f" xlink:href="lcid-20251231.xsd#lcid_WorkingCapitalFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_179da2b1-75f7-4a07-84f2-349bb8c6c48b" xlink:to="loc_lcid_WorkingCapitalFacilityMember_1ab50229-e147-46d4-a42b-b2d9b78c927f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_fcb62f27-11bf-4800-bef7-fd7a701d1aa2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9e377843-b121-4b27-bebc-efacf14b488c" xlink:to="loc_us-gaap_DebtInstrumentAxis_fcb62f27-11bf-4800-bef7-fd7a701d1aa2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_fcb62f27-11bf-4800-bef7-fd7a701d1aa2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_fcb62f27-11bf-4800-bef7-fd7a701d1aa2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_fcb62f27-11bf-4800-bef7-fd7a701d1aa2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_389c3d54-ca45-49a4-a6a5-6abef0dfe8e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_fcb62f27-11bf-4800-bef7-fd7a701d1aa2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_389c3d54-ca45-49a4-a6a5-6abef0dfe8e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_GIBFacilityAgreementMember_cfc38b11-8d0f-455d-a3ca-5dfc8edc91f5" xlink:href="lcid-20251231.xsd#lcid_GIBFacilityAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_389c3d54-ca45-49a4-a6a5-6abef0dfe8e6" xlink:to="loc_lcid_GIBFacilityAgreementMember_cfc38b11-8d0f-455d-a3ca-5dfc8edc91f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023GIBCreditFacilityMember_6878c514-2311-4e0b-ac79-9faf5c4ee6f8" xlink:href="lcid-20251231.xsd#lcid_A2023GIBCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_389c3d54-ca45-49a4-a6a5-6abef0dfe8e6" xlink:to="loc_lcid_A2023GIBCreditFacilityMember_6878c514-2311-4e0b-ac79-9faf5c4ee6f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023AmendedGIBFacilityAgreementMember_b60cf7b9-b006-4f59-9032-4669499c0c29" xlink:href="lcid-20251231.xsd#lcid_A2023AmendedGIBFacilityAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_389c3d54-ca45-49a4-a6a5-6abef0dfe8e6" xlink:to="loc_lcid_A2023AmendedGIBFacilityAgreementMember_b60cf7b9-b006-4f59-9032-4669499c0c29" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2025GIBCreditFacilityMember_019b12a0-8bcd-758a-ad51-3f9e873e9e6f" xlink:href="lcid-20251231.xsd#lcid_A2025GIBCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_389c3d54-ca45-49a4-a6a5-6abef0dfe8e6" xlink:to="loc_lcid_A2025GIBCreditFacilityMember_019b12a0-8bcd-758a-ad51-3f9e873e9e6f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_GIBCreditFacilityMember_019bcabe-846d-7d1f-a8af-5a3b1b87f011" xlink:href="lcid-20251231.xsd#lcid_GIBCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_389c3d54-ca45-49a4-a6a5-6abef0dfe8e6" xlink:to="loc_lcid_GIBCreditFacilityMember_019bcabe-846d-7d1f-a8af-5a3b1b87f011" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_abf3d3b8-04cf-40d4-9e87-c406d1e796c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9e377843-b121-4b27-bebc-efacf14b488c" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_abf3d3b8-04cf-40d4-9e87-c406d1e796c4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_abf3d3b8-04cf-40d4-9e87-c406d1e796c4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_abf3d3b8-04cf-40d4-9e87-c406d1e796c4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_abf3d3b8-04cf-40d4-9e87-c406d1e796c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_ca0e6a1a-9abe-49fc-8d2e-01f98f2264f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_abf3d3b8-04cf-40d4-9e87-c406d1e796c4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_ca0e6a1a-9abe-49fc-8d2e-01f98f2264f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_3443d827-b61b-40e4-ad29-a1fdf002a1a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ca0e6a1a-9abe-49fc-8d2e-01f98f2264f8" xlink:to="loc_us-gaap_LineOfCreditMember_3443d827-b61b-40e4-ad29-a1fdf002a1a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_28c51e7a-eca1-4d99-9fa4-93c34a516f70" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9e377843-b121-4b27-bebc-efacf14b488c" xlink:to="loc_srt_RangeAxis_28c51e7a-eca1-4d99-9fa4-93c34a516f70" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_28c51e7a-eca1-4d99-9fa4-93c34a516f70_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_28c51e7a-eca1-4d99-9fa4-93c34a516f70" xlink:to="loc_srt_RangeMember_28c51e7a-eca1-4d99-9fa4-93c34a516f70_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_4682bb1b-f46d-4fca-8a9d-bed26b66973b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_28c51e7a-eca1-4d99-9fa4-93c34a516f70" xlink:to="loc_srt_RangeMember_4682bb1b-f46d-4fca-8a9d-bed26b66973b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_7d8238a2-2555-4a4b-a171-9bab205353ad" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_4682bb1b-f46d-4fca-8a9d-bed26b66973b" xlink:to="loc_srt_MaximumMember_7d8238a2-2555-4a4b-a171-9bab205353ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeAxis_60715e8d-f97b-408a-b1c7-e1da79720ab5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9e377843-b121-4b27-bebc-efacf14b488c" xlink:to="loc_us-gaap_ShortTermDebtTypeAxis_60715e8d-f97b-408a-b1c7-e1da79720ab5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_60715e8d-f97b-408a-b1c7-e1da79720ab5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_60715e8d-f97b-408a-b1c7-e1da79720ab5" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_60715e8d-f97b-408a-b1c7-e1da79720ab5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtTypeDomain_64dbe64e-59f0-4342-adf7-eda34a5cf589" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShortTermDebtTypeAxis_60715e8d-f97b-408a-b1c7-e1da79720ab5" xlink:to="loc_us-gaap_ShortTermDebtTypeDomain_64dbe64e-59f0-4342-adf7-eda34a5cf589" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_5072cdbe-15c7-48d6-b715-01519e860246" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtTypeDomain_64dbe64e-59f0-4342-adf7-eda34a5cf589" xlink:to="loc_us-gaap_LineOfCreditMember_5072cdbe-15c7-48d6-b715-01519e860246" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LineOfCreditFacilityNumberOfFacilities_efd70be5-1d64-4615-85df-5cd6f20be2f4" xlink:href="lcid-20251231.xsd#lcid_LineOfCreditFacilityNumberOfFacilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_lcid_LineOfCreditFacilityNumberOfFacilities_efd70be5-1d64-4615-85df-5cd6f20be2f4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_5bdc5bcc-e6ca-4de4-ad83-354453780ad7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_5bdc5bcc-e6ca-4de4-ad83-354453780ad7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_349b3215-6bc5-4e2a-bca2-0ec947b81c59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_us-gaap_DebtInstrumentTerm_349b3215-6bc5-4e2a-bca2-0ec947b81c59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_a7eb4443-ba5c-46b6-8916-16e14155f7f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_a7eb4443-ba5c-46b6-8916-16e14155f7f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_3952dc01-fcf3-4e7a-854f-26acbaffeabc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_3952dc01-fcf3-4e7a-854f-26acbaffeabc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019b12a0-8bcd-7b86-aa86-932ff194cde9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019b12a0-8bcd-7b86-aa86-932ff194cde9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019bcabe-846d-7ea8-8dec-829395c212db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_us-gaap_ShortTermBorrowings_019bcabe-846d-7ea8-8dec-829395c212db" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_cd6e0f08-b9e6-40c7-9e07-94dad7697669" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_cd6e0f08-b9e6-40c7-9e07-94dad7697669" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_412b10db-3cb6-4aad-bccb-e7572ab24a53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_412b10db-3cb6-4aad-bccb-e7572ab24a53" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_aad65431-086a-47f7-b3a7-4fde87024e4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_326b55fa-4693-4711-a98e-3a87ce5c8fb8" xlink:to="loc_us-gaap_InterestExpenseDebt_aad65431-086a-47f7-b3a7-4fde87024e4e" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBTABLCreditFacilityDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBTABLCreditFacilityDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBTABLCreditFacilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_87d55f08-452b-4e57-a35b-2a13c4230b9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:to="loc_us-gaap_DebtInstrumentTable_87d55f08-452b-4e57-a35b-2a13c4230b9f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_1c3dc208-d19e-4bbe-b040-13c210fdbea8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_87d55f08-452b-4e57-a35b-2a13c4230b9f" xlink:to="loc_us-gaap_CreditFacilityAxis_1c3dc208-d19e-4bbe-b040-13c210fdbea8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_1c3dc208-d19e-4bbe-b040-13c210fdbea8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_1c3dc208-d19e-4bbe-b040-13c210fdbea8" xlink:to="loc_us-gaap_CreditFacilityDomain_1c3dc208-d19e-4bbe-b040-13c210fdbea8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_9b8e50eb-3ea9-4713-a98b-16dbc8a912eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_1c3dc208-d19e-4bbe-b040-13c210fdbea8" xlink:to="loc_us-gaap_CreditFacilityDomain_9b8e50eb-3ea9-4713-a98b-16dbc8a912eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_6139f0c8-c0ed-426b-a0d5-1567d0dbb53c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_9b8e50eb-3ea9-4713-a98b-16dbc8a912eb" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_6139f0c8-c0ed-426b-a0d5-1567d0dbb53c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_f8b68a28-c937-41c6-9e48-e81ca9d5ba26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_9b8e50eb-3ea9-4713-a98b-16dbc8a912eb" xlink:to="loc_us-gaap_LetterOfCreditMember_f8b68a28-c937-41c6-9e48-e81ca9d5ba26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SwinglineLoanSubfacilityMember_bb68fef2-7ed6-44e5-a059-0b4db640844e" xlink:href="lcid-20251231.xsd#lcid_SwinglineLoanSubfacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_9b8e50eb-3ea9-4713-a98b-16dbc8a912eb" xlink:to="loc_lcid_SwinglineLoanSubfacilityMember_bb68fef2-7ed6-44e5-a059-0b4db640844e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_fd0c19ff-1863-4ef1-bea6-51efc2b45a48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_87d55f08-452b-4e57-a35b-2a13c4230b9f" xlink:to="loc_us-gaap_DebtInstrumentAxis_fd0c19ff-1863-4ef1-bea6-51efc2b45a48" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_fd0c19ff-1863-4ef1-bea6-51efc2b45a48_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_fd0c19ff-1863-4ef1-bea6-51efc2b45a48" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_fd0c19ff-1863-4ef1-bea6-51efc2b45a48_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_387416a3-4fc1-41ed-9f2e-2b1a128b0b56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_fd0c19ff-1863-4ef1-bea6-51efc2b45a48" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_387416a3-4fc1-41ed-9f2e-2b1a128b0b56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ABLCreditFacilityMember_2d85ea88-b584-4d3c-bb79-3922a693d5b7" xlink:href="lcid-20251231.xsd#lcid_ABLCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_387416a3-4fc1-41ed-9f2e-2b1a128b0b56" xlink:to="loc_lcid_ABLCreditFacilityMember_2d85ea88-b584-4d3c-bb79-3922a693d5b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_5141bbb9-b531-4527-9a6e-1f0b5a220b42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_87d55f08-452b-4e57-a35b-2a13c4230b9f" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_5141bbb9-b531-4527-9a6e-1f0b5a220b42" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_5141bbb9-b531-4527-9a6e-1f0b5a220b42_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_5141bbb9-b531-4527-9a6e-1f0b5a220b42" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_5141bbb9-b531-4527-9a6e-1f0b5a220b42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_038295dd-0a89-4342-a172-ef74ef0f8d6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_5141bbb9-b531-4527-9a6e-1f0b5a220b42" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_038295dd-0a89-4342-a172-ef74ef0f8d6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_63c3c85b-a820-44a5-a30f-c7867f3fda01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_038295dd-0a89-4342-a172-ef74ef0f8d6c" xlink:to="loc_us-gaap_LineOfCreditMember_63c3c85b-a820-44a5-a30f-c7867f3fda01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_a1da9c75-a02e-49cf-818f-8451d374a053" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_a1da9c75-a02e-49cf-818f-8451d374a053" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LineOfCreditFacilityAdditionalBorrowingCapacity_d15edc33-1de9-469a-a318-38209fae80e3" xlink:href="lcid-20251231.xsd#lcid_LineOfCreditFacilityAdditionalBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:to="loc_lcid_LineOfCreditFacilityAdditionalBorrowingCapacity_d15edc33-1de9-469a-a318-38209fae80e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_a9be652a-d683-44e6-9e23-afb099a35827" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_a9be652a-d683-44e6-9e23-afb099a35827" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_e97dea40-46fc-403c-9ad8-bfdcb1f8569b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:to="loc_us-gaap_LongTermDebt_e97dea40-46fc-403c-9ad8-bfdcb1f8569b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_b62127f9-6f1c-4037-ae99-3001e88cacb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_b62127f9-6f1c-4037-ae99-3001e88cacb8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_9d0ae6e3-fa2a-4bd5-b5a3-389bfd90c52f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_9d0ae6e3-fa2a-4bd5-b5a3-389bfd90c52f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_bb683334-1dc4-4862-ad27-e9a65ea80b2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_bb683334-1dc4-4862-ad27-e9a65ea80b2b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_69c39cad-4484-4612-aa48-508328e246d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_69c39cad-4484-4612-aa48-508328e246d0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AmortizationOfDeferredIssuanceCostsAndCommitmentFee_848470d1-7181-4be1-b4fd-243fb0405a9e" xlink:href="lcid-20251231.xsd#lcid_AmortizationOfDeferredIssuanceCostsAndCommitmentFee"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_90651256-6a31-4051-9ccb-ca171c36e4d4" xlink:to="loc_lcid_AmortizationOfDeferredIssuanceCostsAndCommitmentFee_848470d1-7181-4be1-b4fd-243fb0405a9e" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/DEBTDDTLCreditFacilityDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#DEBTDDTLCreditFacilityDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/DEBTDDTLCreditFacilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_4e0b6b96-774f-45aa-8e94-483cc9a0f121" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_b6148aa5-8818-4983-856e-2ddc73cdbcb6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4e0b6b96-774f-45aa-8e94-483cc9a0f121" xlink:to="loc_us-gaap_DebtInstrumentTable_b6148aa5-8818-4983-856e-2ddc73cdbcb6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_a2697899-278d-4f1e-bebf-2517df31c383" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b6148aa5-8818-4983-856e-2ddc73cdbcb6" xlink:to="loc_us-gaap_CreditFacilityAxis_a2697899-278d-4f1e-bebf-2517df31c383" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_a2697899-278d-4f1e-bebf-2517df31c383_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_a2697899-278d-4f1e-bebf-2517df31c383" xlink:to="loc_us-gaap_CreditFacilityDomain_a2697899-278d-4f1e-bebf-2517df31c383_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_d928ee2f-bc3d-4108-ad7b-d856d4eff6e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_a2697899-278d-4f1e-bebf-2517df31c383" xlink:to="loc_us-gaap_CreditFacilityDomain_d928ee2f-bc3d-4108-ad7b-d856d4eff6e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_ba7738c9-6859-486b-9689-68cf26e033c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_d928ee2f-bc3d-4108-ad7b-d856d4eff6e2" xlink:to="loc_us-gaap_SecuredDebtMember_ba7738c9-6859-486b-9689-68cf26e033c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_4142679e-fdbc-4721-b91d-b805c1ac15ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b6148aa5-8818-4983-856e-2ddc73cdbcb6" xlink:to="loc_us-gaap_DebtInstrumentAxis_4142679e-fdbc-4721-b91d-b805c1ac15ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_4142679e-fdbc-4721-b91d-b805c1ac15ee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_4142679e-fdbc-4721-b91d-b805c1ac15ee" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_4142679e-fdbc-4721-b91d-b805c1ac15ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c120cf23-dd2b-4684-92a8-860fa85cc991" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_4142679e-fdbc-4721-b91d-b805c1ac15ee" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c120cf23-dd2b-4684-92a8-860fa85cc991" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DDTLCreditFacilityMember_a29f5e5a-1b82-4075-a7e1-820027964f5b" xlink:href="lcid-20251231.xsd#lcid_DDTLCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c120cf23-dd2b-4684-92a8-860fa85cc991" xlink:to="loc_lcid_DDTLCreditFacilityMember_a29f5e5a-1b82-4075-a7e1-820027964f5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_3711ddfd-78cb-40fa-aa46-b3c076cb80cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b6148aa5-8818-4983-856e-2ddc73cdbcb6" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_3711ddfd-78cb-40fa-aa46-b3c076cb80cd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_3711ddfd-78cb-40fa-aa46-b3c076cb80cd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3711ddfd-78cb-40fa-aa46-b3c076cb80cd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_3711ddfd-78cb-40fa-aa46-b3c076cb80cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_6c4f805f-4978-4b37-88d8-1017b8832a6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_3711ddfd-78cb-40fa-aa46-b3c076cb80cd" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_6c4f805f-4978-4b37-88d8-1017b8832a6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DelayedDrawTermLoanMember_9be89699-df8e-4d5f-919e-d07a8850cb05" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DelayedDrawTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_6c4f805f-4978-4b37-88d8-1017b8832a6b" xlink:to="loc_us-gaap_DelayedDrawTermLoanMember_9be89699-df8e-4d5f-919e-d07a8850cb05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_e5e68adf-bf0c-4f83-b996-224d6ac08c49" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_6c4f805f-4978-4b37-88d8-1017b8832a6b" xlink:to="loc_us-gaap_LineOfCreditMember_e5e68adf-bf0c-4f83-b996-224d6ac08c49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_fea7222a-fca2-439c-8313-48ef2041fd27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4e0b6b96-774f-45aa-8e94-483cc9a0f121" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_fea7222a-fca2-439c-8313-48ef2041fd27" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_dba3ec16-71fd-4724-98a8-c642458076c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4e0b6b96-774f-45aa-8e94-483cc9a0f121" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_dba3ec16-71fd-4724-98a8-c642458076c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_11f687b9-553f-4576-917b-5f94cb74b502" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4e0b6b96-774f-45aa-8e94-483cc9a0f121" xlink:to="loc_us-gaap_LongTermDebt_11f687b9-553f-4576-917b-5f94cb74b502" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_4edddd5b-753d-4e9f-b624-be1d0b6db2f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4e0b6b96-774f-45aa-8e94-483cc9a0f121" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_4edddd5b-753d-4e9f-b624-be1d0b6db2f3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AmortizationOfDeferredIssuanceCostsAndCommitmentFee_feaf40c9-2ed8-446c-b132-33bd181a6394" xlink:href="lcid-20251231.xsd#lcid_AmortizationOfDeferredIssuanceCostsAndCommitmentFee"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4e0b6b96-774f-45aa-8e94-483cc9a0f121" xlink:to="loc_lcid_AmortizationOfDeferredIssuanceCostsAndCommitmentFee_feaf40c9-2ed8-446c-b132-33bd181a6394" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/COMMONSTOCKWARRANTLIABILITYNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#COMMONSTOCKWARRANTLIABILITYNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/COMMONSTOCKWARRANTLIABILITYNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightLineItems_259d9e5d-688b-445f-817d-50e2fbb1b201" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightTable_5630370f-94d6-40b9-8e84-e91dc924c915" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_259d9e5d-688b-445f-817d-50e2fbb1b201" xlink:to="loc_us-gaap_ClassOfWarrantOrRightTable_5630370f-94d6-40b9-8e84-e91dc924c915" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_71284376-9e99-417f-ac1f-b2bde3dde838" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_5630370f-94d6-40b9-8e84-e91dc924c915" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_71284376-9e99-417f-ac1f-b2bde3dde838" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_71284376-9e99-417f-ac1f-b2bde3dde838_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_71284376-9e99-417f-ac1f-b2bde3dde838" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_71284376-9e99-417f-ac1f-b2bde3dde838_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_f70ca50c-246e-490e-821b-e3512658f56c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_71284376-9e99-417f-ac1f-b2bde3dde838" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_f70ca50c-246e-490e-821b-e3512658f56c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PrivatePlacementWarrantsMember_9ee8f74a-ce14-47bc-8d9d-b1c4712b7ab7" xlink:href="lcid-20251231.xsd#lcid_PrivatePlacementWarrantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_f70ca50c-246e-490e-821b-e3512658f56c" xlink:to="loc_lcid_PrivatePlacementWarrantsMember_9ee8f74a-ce14-47bc-8d9d-b1c4712b7ab7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightOutstanding_777da5c9-4d96-48f3-8ebe-14a63f15ed62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_259d9e5d-688b-445f-817d-50e2fbb1b201" xlink:to="loc_us-gaap_ClassOfWarrantOrRightOutstanding_777da5c9-4d96-48f3-8ebe-14a63f15ed62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_019b0e61-b4bd-70da-9600-5ba40f925a30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteStockSplitConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_259d9e5d-688b-445f-817d-50e2fbb1b201" xlink:to="loc_us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_019b0e61-b4bd-70da-9600-5ba40f925a30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_8c2c4986-f247-48e8-9a8f-971ec2be90d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_259d9e5d-688b-445f-817d-50e2fbb1b201" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_8c2c4986-f247-48e8-9a8f-971ec2be90d0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_WarrantsFairValueDisclosure_6ca79708-3e26-4501-b3d7-875b091553a2" xlink:href="lcid-20251231.xsd#lcid_WarrantsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_259d9e5d-688b-445f-817d-50e2fbb1b201" xlink:to="loc_lcid_WarrantsFairValueDisclosure_6ca79708-3e26-4501-b3d7-875b091553a2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAdjustmentOfWarrants_c639f22d-8c45-41b5-bd62-500d57215023" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAdjustmentOfWarrants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_259d9e5d-688b-445f-817d-50e2fbb1b201" xlink:to="loc_us-gaap_FairValueAdjustmentOfWarrants_c639f22d-8c45-41b5-bd62-500d57215023" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/COMMONSTOCKWARRANTLIABILITYScheduleofFairValueofPrivatePlacementWarrantsDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#COMMONSTOCKWARRANTLIABILITYScheduleofFairValueofPrivatePlacementWarrantsDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/COMMONSTOCKWARRANTLIABILITYScheduleofFairValueofPrivatePlacementWarrantsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightLineItems_6774b631-7c56-438d-b442-57f0eca316f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightTable_4f0313de-8199-4cbb-a1d2-77930baf45f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_6774b631-7c56-438d-b442-57f0eca316f1" xlink:to="loc_us-gaap_ClassOfWarrantOrRightTable_4f0313de-8199-4cbb-a1d2-77930baf45f2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_48fc40b0-f9a0-48b0-97b9-dcf544651f6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_4f0313de-8199-4cbb-a1d2-77930baf45f2" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_48fc40b0-f9a0-48b0-97b9-dcf544651f6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_48fc40b0-f9a0-48b0-97b9-dcf544651f6b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_48fc40b0-f9a0-48b0-97b9-dcf544651f6b" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_48fc40b0-f9a0-48b0-97b9-dcf544651f6b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_d1e94cbc-d409-4540-9104-39c288fdf765" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_48fc40b0-f9a0-48b0-97b9-dcf544651f6b" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_d1e94cbc-d409-4540-9104-39c288fdf765" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PrivatePlacementWarrantsPerShareOfCommonStockMember_5de3d578-f931-4a06-bcd9-4857ab0bf2f3" xlink:href="lcid-20251231.xsd#lcid_PrivatePlacementWarrantsPerShareOfCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_d1e94cbc-d409-4540-9104-39c288fdf765" xlink:to="loc_lcid_PrivatePlacementWarrantsPerShareOfCommonStockMember_5de3d578-f931-4a06-bcd9-4857ab0bf2f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_WarrantFairValuePerShare_9ec89752-d43c-4682-9b26-13a44abb3572" xlink:href="lcid-20251231.xsd#lcid_WarrantFairValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_6774b631-7c56-438d-b442-57f0eca316f1" xlink:to="loc_lcid_WarrantFairValuePerShare_9ec89752-d43c-4682-9b26-13a44abb3572" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/COMMONSTOCKWARRANTLIABILITYScheduleofLevel3FairValueInputsDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#COMMONSTOCKWARRANTLIABILITYScheduleofLevel3FairValueInputsDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/COMMONSTOCKWARRANTLIABILITYScheduleofLevel3FairValueInputsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightLineItems_fe645853-21cd-4ce0-adad-f644b008e80e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightTable_61ceafd7-9987-45bb-8abe-d915fc91dc46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfWarrantOrRightTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_fe645853-21cd-4ce0-adad-f644b008e80e" xlink:to="loc_us-gaap_ClassOfWarrantOrRightTable_61ceafd7-9987-45bb-8abe-d915fc91dc46" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_17f62b0b-0f2e-417d-b72c-37599bb723a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_61ceafd7-9987-45bb-8abe-d915fc91dc46" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_17f62b0b-0f2e-417d-b72c-37599bb723a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_17f62b0b-0f2e-417d-b72c-37599bb723a3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_17f62b0b-0f2e-417d-b72c-37599bb723a3" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_17f62b0b-0f2e-417d-b72c-37599bb723a3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_965c1940-d22b-4c15-8f14-782876522847" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_17f62b0b-0f2e-417d-b72c-37599bb723a3" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_965c1940-d22b-4c15-8f14-782876522847" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputOptionVolatilityMember_e3fef6b9-5e71-4966-96c8-5d8a4c61a2ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputOptionVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_965c1940-d22b-4c15-8f14-782876522847" xlink:to="loc_us-gaap_MeasurementInputOptionVolatilityMember_e3fef6b9-5e71-4966-96c8-5d8a4c61a2ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedTermMember_1ee20f69-d555-4aa4-aeb9-c6b1201926cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputExpectedTermMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_965c1940-d22b-4c15-8f14-782876522847" xlink:to="loc_us-gaap_MeasurementInputExpectedTermMember_1ee20f69-d555-4aa4-aeb9-c6b1201926cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_22bfc218-7370-4304-826d-0481d0c0f1cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_965c1940-d22b-4c15-8f14-782876522847" xlink:to="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_22bfc218-7370-4304-826d-0481d0c0f1cb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedDividendRateMember_3cfb5a62-56d7-40a2-b43f-7c6d39cbd11b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputExpectedDividendRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_965c1940-d22b-4c15-8f14-782876522847" xlink:to="loc_us-gaap_MeasurementInputExpectedDividendRateMember_3cfb5a62-56d7-40a2-b43f-7c6d39cbd11b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7224b298-b5dc-4b89-81ca-945169738a24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ClassOfWarrantOrRightTable_61ceafd7-9987-45bb-8abe-d915fc91dc46" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7224b298-b5dc-4b89-81ca-945169738a24" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7224b298-b5dc-4b89-81ca-945169738a24_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7224b298-b5dc-4b89-81ca-945169738a24" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7224b298-b5dc-4b89-81ca-945169738a24_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_add3ddad-c245-4a04-97e3-23ab0e68095f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_7224b298-b5dc-4b89-81ca-945169738a24" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_add3ddad-c245-4a04-97e3-23ab0e68095f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_fc6d3645-13e2-43ee-9cb9-dadf7a19cf62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_add3ddad-c245-4a04-97e3-23ab0e68095f" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_fc6d3645-13e2-43ee-9cb9-dadf7a19cf62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingMeasurementInput_6ba56383-63af-4e63-9aab-20f9cf44c162" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantsAndRightsOutstandingMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_fe645853-21cd-4ce0-adad-f644b008e80e" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingMeasurementInput_6ba56383-63af-4e63-9aab-20f9cf44c162" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantsAndRightsOutstandingTerm_e5aaace2-fc56-42e4-b8f7-64a33302342d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantsAndRightsOutstandingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightLineItems_fe645853-21cd-4ce0-adad-f644b008e80e" xlink:to="loc_us-gaap_WarrantsAndRightsOutstandingTerm_e5aaace2-fc56-42e4-b8f7-64a33302342d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/REDEEMABLECONVERTIBLEPREFERREDSTOCKNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#REDEEMABLECONVERTIBLEPREFERREDSTOCKNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/REDEEMABLECONVERTIBLEPREFERREDSTOCKNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityByClassOfStockTable_d8b7c463-dcd9-465b-ae54-b7e6402f594a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityByClassOfStockTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_us-gaap_TemporaryEquityByClassOfStockTable_d8b7c463-dcd9-465b-ae54-b7e6402f594a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_ebee56e0-cedd-4852-a6a0-86a59fa089d1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_d8b7c463-dcd9-465b-ae54-b7e6402f594a" xlink:to="loc_srt_CounterpartyNameAxis_ebee56e0-cedd-4852-a6a0-86a59fa089d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_ebee56e0-cedd-4852-a6a0-86a59fa089d1_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_ebee56e0-cedd-4852-a6a0-86a59fa089d1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_ebee56e0-cedd-4852-a6a0-86a59fa089d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_95318050-44e0-4fd2-b4ff-36e99c4e5061" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_ebee56e0-cedd-4852-a6a0-86a59fa089d1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_95318050-44e0-4fd2-b4ff-36e99c4e5061" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AyarThirdInvestmentCompanyMember_84c5201d-f529-46ef-993e-e7f5037cb93d" xlink:href="lcid-20251231.xsd#lcid_AyarThirdInvestmentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_95318050-44e0-4fd2-b4ff-36e99c4e5061" xlink:to="loc_lcid_AyarThirdInvestmentCompanyMember_84c5201d-f529-46ef-993e-e7f5037cb93d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1d0aadc1-cc1e-42b0-8bc4-4d3ad44d6057" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_d8b7c463-dcd9-465b-ae54-b7e6402f594a" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1d0aadc1-cc1e-42b0-8bc4-4d3ad44d6057" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_1d0aadc1-cc1e-42b0-8bc4-4d3ad44d6057_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1d0aadc1-cc1e-42b0-8bc4-4d3ad44d6057" xlink:to="loc_us-gaap_RelatedPartyDomain_1d0aadc1-cc1e-42b0-8bc4-4d3ad44d6057_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_459ff402-b3db-4bd5-a3e2-1acd9e60ad6f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_1d0aadc1-cc1e-42b0-8bc4-4d3ad44d6057" xlink:to="loc_us-gaap_RelatedPartyDomain_459ff402-b3db-4bd5-a3e2-1acd9e60ad6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_bbd63ba4-f45a-4d8e-8d9a-8171f5314f51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_459ff402-b3db-4bd5-a3e2-1acd9e60ad6f" xlink:to="loc_us-gaap_RelatedPartyMember_bbd63ba4-f45a-4d8e-8d9a-8171f5314f51" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_3de22c16-54d9-43e8-8697-dc0ea00e6ddf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_d8b7c463-dcd9-465b-ae54-b7e6402f594a" xlink:to="loc_us-gaap_StatementClassOfStockAxis_3de22c16-54d9-43e8-8697-dc0ea00e6ddf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_3de22c16-54d9-43e8-8697-dc0ea00e6ddf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_3de22c16-54d9-43e8-8697-dc0ea00e6ddf" xlink:to="loc_us-gaap_ClassOfStockDomain_3de22c16-54d9-43e8-8697-dc0ea00e6ddf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_7c945808-5ae4-4285-b4c4-4f546c9be42f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_3de22c16-54d9-43e8-8697-dc0ea00e6ddf" xlink:to="loc_us-gaap_ClassOfStockDomain_7c945808-5ae4-4285-b4c4-4f546c9be42f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_a69a3faa-f26c-4dea-9aec-53f24e4a2b69" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_7c945808-5ae4-4285-b4c4-4f546c9be42f" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_a69a3faa-f26c-4dea-9aec-53f24e4a2b69" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_50bce586-e4b4-4484-abe8-0fca2b532bdd" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_7c945808-5ae4-4285-b4c4-4f546c9be42f" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_50bce586-e4b4-4484-abe8-0fca2b532bdd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_1edb94cb-4e8c-4c31-a5e1-84ac527324c0" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_7c945808-5ae4-4285-b4c4-4f546c9be42f" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_1edb94cb-4e8c-4c31-a5e1-84ac527324c0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_10c6ca9b-c1b5-467d-becf-2e8cf44e2f8b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_10c6ca9b-c1b5-467d-becf-2e8cf44e2f8b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockConsiderationToReceiveOnTransaction_cfae6c52-42cd-4107-bf60-de13c24b7802" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockConsiderationToReceiveOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_SaleOfStockConsiderationToReceiveOnTransaction_cfae6c52-42cd-4107-bf60-de13c24b7802" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockGrossConsiderationReceivedOnTransaction_dad81f51-1ec0-44c6-a4fc-d16a1adc3462" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockGrossConsiderationReceivedOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_SaleOfStockGrossConsiderationReceivedOnTransaction_dad81f51-1ec0-44c6-a4fc-d16a1adc3462" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityInitialValuePerShare_d01fba8b-8ad7-4703-b11c-951f609fd651" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityInitialValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityInitialValuePerShare_d01fba8b-8ad7-4703-b11c-951f609fd651" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityDividendRatePercentage_9345674a-e154-446a-8803-774af37f3a73" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityDividendRatePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityDividendRatePercentage_9345674a-e154-446a-8803-774af37f3a73" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityLiquidationPreference_7f2da073-5bb1-440a-9fd4-00e969709249" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityLiquidationPreference"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_us-gaap_TemporaryEquityLiquidationPreference_7f2da073-5bb1-440a-9fd4-00e969709249" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityVotingCapDenominator_288439b5-4ad6-4fad-ab43-e2710fb59f77" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityVotingCapDenominator"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityVotingCapDenominator_288439b5-4ad6-4fad-ab43-e2710fb59f77" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityThresholdPercentageOfSharesIssuedOnInitialDateOutstanding_9c4640d2-b697-4aff-816c-2154ec1b1526" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityThresholdPercentageOfSharesIssuedOnInitialDateOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityThresholdPercentageOfSharesIssuedOnInitialDateOutstanding_9c4640d2-b697-4aff-816c-2154ec1b1526" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityThresholdPercentageOfSharesOwned_764f2edc-fe19-4bb0-a957-4d4ffdbbcc43" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityThresholdPercentageOfSharesOwned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityThresholdPercentageOfSharesOwned_764f2edc-fe19-4bb0-a957-4d4ffdbbcc43" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityRedemptionPricePerShare_34361e2e-059d-4785-af13-0b99283b512c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityRedemptionPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_us-gaap_TemporaryEquityRedemptionPricePerShare_34361e2e-059d-4785-af13-0b99283b512c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ConvertiblePreferredStockInitialConversionPrice_97dec743-eb58-4a10-bbd0-575b1aaf94b1" xlink:href="lcid-20251231.xsd#lcid_ConvertiblePreferredStockInitialConversionPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_ConvertiblePreferredStockInitialConversionPrice_97dec743-eb58-4a10-bbd0-575b1aaf94b1" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityConvertibleThresholdPercentageOfStockPriceTrigger_e3a38f63-d57d-4a68-9d80-2ffe1c1b1f04" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityConvertibleThresholdPercentageOfStockPriceTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityConvertibleThresholdPercentageOfStockPriceTrigger_e3a38f63-d57d-4a68-9d80-2ffe1c1b1f04" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityConvertibleThresholdTradingDays_b519d5bf-3f5f-40c4-8fdc-4de86a462afe" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityConvertibleThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityConvertibleThresholdTradingDays_b519d5bf-3f5f-40c4-8fdc-4de86a462afe" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityConvertibleThresholdConsecutiveTradingDays_861a5ea7-1bdf-4019-9e51-d06c1bfec317" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityConvertibleThresholdConsecutiveTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityConvertibleThresholdConsecutiveTradingDays_861a5ea7-1bdf-4019-9e51-d06c1bfec317" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityConvertibleLiquidityConditionsSatisfiedThresholdTradingDays_93a92618-4a3a-4570-93bc-7558d898d721" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityConvertibleLiquidityConditionsSatisfiedThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityConvertibleLiquidityConditionsSatisfiedThresholdTradingDays_93a92618-4a3a-4570-93bc-7558d898d721" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityConvertibleAverageDailyVWAPPeriod_58c6ad43-6f3c-4088-aba9-778ecb7e0a77" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityConvertibleAverageDailyVWAPPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityConvertibleAverageDailyVWAPPeriod_58c6ad43-6f3c-4088-aba9-778ecb7e0a77" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityConvertibleOptionalRedemptionAverageDailyVWAPPeriod_0637058a-4d7b-4eb2-9a81-c6dfd46b9934" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityConvertibleOptionalRedemptionAverageDailyVWAPPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityConvertibleOptionalRedemptionAverageDailyVWAPPeriod_0637058a-4d7b-4eb2-9a81-c6dfd46b9934" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ConvertiblePreferredStockCallableTerm_94b88519-473c-457d-839d-7be2296dac66" xlink:href="lcid-20251231.xsd#lcid_ConvertiblePreferredStockCallableTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_ConvertiblePreferredStockCallableTerm_94b88519-473c-457d-839d-7be2296dac66" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_StockIssuanceCosts_5370bed2-a29a-45d9-b5bc-a6d16e35fecb" xlink:href="lcid-20251231.xsd#lcid_StockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_StockIssuanceCosts_5370bed2-a29a-45d9-b5bc-a6d16e35fecb" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_33f8d0e5-7997-41f8-837c-c483f990882c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_33f8d0e5-7997-41f8-837c-c483f990882c" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TemporaryEquityAccretionNet_4a7d7ed8-6073-40d4-bfd3-f5c01d000f8c" xlink:href="lcid-20251231.xsd#lcid_TemporaryEquityAccretionNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_lcid_TemporaryEquityAccretionNet_4a7d7ed8-6073-40d4-bfd3-f5c01d000f8c" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_8070f4db-7a43-4013-88ce-a0039ac0ff38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_8070f4db-7a43-4013-88ce-a0039ac0ff38" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_87d32c90-9eff-422f-bc8b-cd16618a5475" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_64c4404d-9eb6-410c-a3f5-7a3a42b16fa0" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_87d32c90-9eff-422f-bc8b-cd16618a5475" xlink:type="arc" order="22"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/REDEEMABLECONVERTIBLEPREFERREDSTOCKScheduleofSignificantInputsUsedintheValuationoftheDerivativeLiabilityDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#REDEEMABLECONVERTIBLEPREFERREDSTOCKScheduleofSignificantInputsUsedintheValuationoftheDerivativeLiabilityDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/REDEEMABLECONVERTIBLEPREFERREDSTOCKScheduleofSignificantInputsUsedintheValuationoftheDerivativeLiabilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_7582ea6c-7b91-4260-92da-6991255f3598" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_87b3b46d-32ae-429a-a07f-9495c0f3116f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_7582ea6c-7b91-4260-92da-6991255f3598" xlink:to="loc_us-gaap_DerivativeTable_87b3b46d-32ae-429a-a07f-9495c0f3116f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_0f05f30c-5b42-4c8b-b66c-a3dd42627650" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_87b3b46d-32ae-429a-a07f-9495c0f3116f" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_0f05f30c-5b42-4c8b-b66c-a3dd42627650" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_0f05f30c-5b42-4c8b-b66c-a3dd42627650_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_0f05f30c-5b42-4c8b-b66c-a3dd42627650" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_0f05f30c-5b42-4c8b-b66c-a3dd42627650_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_376771f5-e27d-44a1-ab65-4b06e53457a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_0f05f30c-5b42-4c8b-b66c-a3dd42627650" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_376771f5-e27d-44a1-ab65-4b06e53457a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MeasurementInputVolatilityMember_019b0e43-11da-76a0-88b0-bccde61f6fb1" xlink:href="lcid-20251231.xsd#lcid_MeasurementInputVolatilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_376771f5-e27d-44a1-ab65-4b06e53457a0" xlink:to="loc_lcid_MeasurementInputVolatilityMember_019b0e43-11da-76a0-88b0-bccde61f6fb1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputCreditSpreadMember_5941c642-0f54-4dd3-8414-469bdf0177a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputCreditSpreadMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_376771f5-e27d-44a1-ab65-4b06e53457a0" xlink:to="loc_us-gaap_MeasurementInputCreditSpreadMember_5941c642-0f54-4dd3-8414-469bdf0177a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputSharePriceMember_bdfca55a-fb9c-4435-81a7-04c35f1ddb11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputSharePriceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_376771f5-e27d-44a1-ab65-4b06e53457a0" xlink:to="loc_us-gaap_MeasurementInputSharePriceMember_bdfca55a-fb9c-4435-81a7-04c35f1ddb11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputExpectedTermMember_019b0e40-b30d-7f9a-a543-4190ed299aaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputExpectedTermMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_376771f5-e27d-44a1-ab65-4b06e53457a0" xlink:to="loc_us-gaap_MeasurementInputExpectedTermMember_019b0e40-b30d-7f9a-a543-4190ed299aaa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_a23231e2-a503-4334-bd7b-f5dbea90d6cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputRiskFreeInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_376771f5-e27d-44a1-ab65-4b06e53457a0" xlink:to="loc_us-gaap_MeasurementInputRiskFreeInterestRateMember_a23231e2-a503-4334-bd7b-f5dbea90d6cc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2ced17e1-903a-461d-b257-379fa08967e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_87b3b46d-32ae-429a-a07f-9495c0f3116f" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2ced17e1-903a-461d-b257-379fa08967e7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_2ced17e1-903a-461d-b257-379fa08967e7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2ced17e1-903a-461d-b257-379fa08967e7" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_2ced17e1-903a-461d-b257-379fa08967e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_33cfb0ba-b90a-4221-afea-d276ff7e7f86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2ced17e1-903a-461d-b257-379fa08967e7" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_33cfb0ba-b90a-4221-afea-d276ff7e7f86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_38f81f87-ec5f-42f3-9c62-8d7bd0bb8316" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_33cfb0ba-b90a-4221-afea-d276ff7e7f86" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_38f81f87-ec5f-42f3-9c62-8d7bd0bb8316" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_0128ef59-a8ee-4983-ad77-32dc817dc3f6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_87b3b46d-32ae-429a-a07f-9495c0f3116f" xlink:to="loc_srt_CounterpartyNameAxis_0128ef59-a8ee-4983-ad77-32dc817dc3f6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_0128ef59-a8ee-4983-ad77-32dc817dc3f6_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_0128ef59-a8ee-4983-ad77-32dc817dc3f6" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_0128ef59-a8ee-4983-ad77-32dc817dc3f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9b62d395-406c-4adf-9bc4-515010f61a5f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_0128ef59-a8ee-4983-ad77-32dc817dc3f6" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9b62d395-406c-4adf-9bc4-515010f61a5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AyarThirdInvestmentCompanyMember_e47dc242-8aac-4c77-bc5a-92b5dd53c42c" xlink:href="lcid-20251231.xsd#lcid_AyarThirdInvestmentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9b62d395-406c-4adf-9bc4-515010f61a5f" xlink:to="loc_lcid_AyarThirdInvestmentCompanyMember_e47dc242-8aac-4c77-bc5a-92b5dd53c42c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_eac18c08-25a0-431b-8b63-1d2bebf18740" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_87b3b46d-32ae-429a-a07f-9495c0f3116f" xlink:to="loc_us-gaap_StatementClassOfStockAxis_eac18c08-25a0-431b-8b63-1d2bebf18740" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_eac18c08-25a0-431b-8b63-1d2bebf18740_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_eac18c08-25a0-431b-8b63-1d2bebf18740" xlink:to="loc_us-gaap_ClassOfStockDomain_eac18c08-25a0-431b-8b63-1d2bebf18740_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_15137a59-a6a8-4ea5-b9a1-b4a58d9c98e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_eac18c08-25a0-431b-8b63-1d2bebf18740" xlink:to="loc_us-gaap_ClassOfStockDomain_15137a59-a6a8-4ea5-b9a1-b4a58d9c98e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_fdfa5ca1-2ea7-46b8-8f0c-16b663ec436c" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_15137a59-a6a8-4ea5-b9a1-b4a58d9c98e4" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_fdfa5ca1-2ea7-46b8-8f0c-16b663ec436c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_afb21933-1a32-4f59-8917-3d0cdcc09bb6" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_15137a59-a6a8-4ea5-b9a1-b4a58d9c98e4" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_afb21933-1a32-4f59-8917-3d0cdcc09bb6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityMeasurementInput_4674edbb-d4b9-415c-83ba-741d49bf7d3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_7582ea6c-7b91-4260-92da-6991255f3598" xlink:to="loc_us-gaap_DerivativeLiabilityMeasurementInput_4674edbb-d4b9-415c-83ba-741d49bf7d3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DerivativeLiabilityMeasurementInputExpectedTerm_b92e507c-6d19-4a0f-8a6c-41017631d2b8" xlink:href="lcid-20251231.xsd#lcid_DerivativeLiabilityMeasurementInputExpectedTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_7582ea6c-7b91-4260-92da-6991255f3598" xlink:to="loc_lcid_DerivativeLiabilityMeasurementInputExpectedTerm_b92e507c-6d19-4a0f-8a6c-41017631d2b8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/STOCKHOLDERSEQUITYNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#STOCKHOLDERSEQUITYNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/STOCKHOLDERSEQUITYNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_56d7a75c-7404-483c-a760-cad5d1071d51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_56d7a75c-7404-483c-a760-cad5d1071d51" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019b0e02-e000-76c6-a500-e17d4e84655c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_56d7a75c-7404-483c-a760-cad5d1071d51" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019b0e02-e000-76c6-a500-e17d4e84655c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019b0e02-e000-76c6-a500-e17d4e84655c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019b0e02-e000-76c6-a500-e17d4e84655c" xlink:to="loc_us-gaap_ClassOfStockDomain_019b0e02-e000-76c6-a500-e17d4e84655c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019b0e02-e000-7e93-b99e-787521bbcc0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019b0e02-e000-76c6-a500-e17d4e84655c" xlink:to="loc_us-gaap_ClassOfStockDomain_019b0e02-e000-7e93-b99e-787521bbcc0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_019b0e02-e000-7019-b5a7-9a8df60aeac4" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019b0e02-e000-7e93-b99e-787521bbcc0b" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_019b0e02-e000-7019-b5a7-9a8df60aeac4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_019b0e02-e000-7d22-827b-304b76aaaaf4" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019b0e02-e000-7e93-b99e-787521bbcc0b" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_019b0e02-e000-7d22-827b-304b76aaaaf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019b0e03-a48a-716f-b4d8-f61864732281" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_56d7a75c-7404-483c-a760-cad5d1071d51" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019b0e03-a48a-716f-b4d8-f61864732281" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b0e03-a48a-716f-b4d8-f61864732281_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019b0e03-a48a-716f-b4d8-f61864732281" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b0e03-a48a-716f-b4d8-f61864732281_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b0e03-a48a-73b6-bef2-5bd15c4ae84f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019b0e03-a48a-716f-b4d8-f61864732281" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b0e03-a48a-73b6-bef2-5bd15c4ae84f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023UnderwritingAgreementMember_019b0e03-a48a-7e0d-9dfd-6e889378c6aa" xlink:href="lcid-20251231.xsd#lcid_A2023UnderwritingAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b0e03-a48a-73b6-bef2-5bd15c4ae84f" xlink:to="loc_lcid_A2023UnderwritingAgreementMember_019b0e03-a48a-7e0d-9dfd-6e889378c6aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023SubscriptionAgreementMember_019b0e03-a48a-713a-bd9b-16bd6a02142c" xlink:href="lcid-20251231.xsd#lcid_A2023SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b0e03-a48a-73b6-bef2-5bd15c4ae84f" xlink:to="loc_lcid_A2023SubscriptionAgreementMember_019b0e03-a48a-713a-bd9b-16bd6a02142c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024UnderwritingAgreementMember_019b0e03-a48a-770b-9518-7fbfc4ab0644" xlink:href="lcid-20251231.xsd#lcid_A2024UnderwritingAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b0e03-a48a-73b6-bef2-5bd15c4ae84f" xlink:to="loc_lcid_A2024UnderwritingAgreementMember_019b0e03-a48a-770b-9518-7fbfc4ab0644" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024SubscriptionAgreementMember_019b0e03-a48a-73dd-87b1-3cd0cf50b228" xlink:href="lcid-20251231.xsd#lcid_A2024SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b0e03-a48a-73b6-bef2-5bd15c4ae84f" xlink:to="loc_lcid_A2024SubscriptionAgreementMember_019b0e03-a48a-73dd-87b1-3cd0cf50b228" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024SubscriptionAgreementOverAllotmentOptionMember_019b0e03-a48a-7b47-bbe9-759c04e8478c" xlink:href="lcid-20251231.xsd#lcid_A2024SubscriptionAgreementOverAllotmentOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b0e03-a48a-73b6-bef2-5bd15c4ae84f" xlink:to="loc_lcid_A2024SubscriptionAgreementOverAllotmentOptionMember_019b0e03-a48a-7b47-bbe9-759c04e8478c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2025SubscriptionAgreementMember_019b0e03-a48a-77d4-a995-3025e1b7fb5e" xlink:href="lcid-20251231.xsd#lcid_A2025SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019b0e03-a48a-73b6-bef2-5bd15c4ae84f" xlink:to="loc_lcid_A2025SubscriptionAgreementMember_019b0e03-a48a-77d4-a995-3025e1b7fb5e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019b0e03-a48a-76ca-a14c-368b871ae5a6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_56d7a75c-7404-483c-a760-cad5d1071d51" xlink:to="loc_srt_CounterpartyNameAxis_019b0e03-a48a-76ca-a14c-368b871ae5a6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0e03-a48a-76ca-a14c-368b871ae5a6_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019b0e03-a48a-76ca-a14c-368b871ae5a6" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0e03-a48a-76ca-a14c-368b871ae5a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0e03-a48a-73a0-8fc4-c775a378ef76" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019b0e03-a48a-76ca-a14c-368b871ae5a6" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0e03-a48a-73a0-8fc4-c775a378ef76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AyarThirdInvestmentCompanyMember_019b0e03-a48a-7512-9fb3-a9a5d642bb4a" xlink:href="lcid-20251231.xsd#lcid_AyarThirdInvestmentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0e03-a48a-73a0-8fc4-c775a378ef76" xlink:to="loc_lcid_AyarThirdInvestmentCompanyMember_019b0e03-a48a-7512-9fb3-a9a5d642bb4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TheUnderwriterMember_019b0e03-a48a-7a52-92b9-6e217447b38e" xlink:href="lcid-20251231.xsd#lcid_TheUnderwriterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0e03-a48a-73a0-8fc4-c775a378ef76" xlink:to="loc_lcid_TheUnderwriterMember_019b0e03-a48a-7a52-92b9-6e217447b38e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SMBMember_019b0e03-a48a-70f5-84f8-71aaf0d81dfe" xlink:href="lcid-20251231.xsd#lcid_SMBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0e03-a48a-73a0-8fc4-c775a378ef76" xlink:to="loc_lcid_SMBMember_019b0e03-a48a-70f5-84f8-71aaf0d81dfe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_EmployeesMember_019b0e05-93d7-7ff4-8a00-565239d58156" xlink:href="lcid-20251231.xsd#lcid_EmployeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0e03-a48a-73a0-8fc4-c775a378ef76" xlink:to="loc_lcid_EmployeesMember_019b0e05-93d7-7ff4-8a00-565239d58156" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_BoardOfDirectorsOfAtievaMember_019b0e05-93d7-743b-8dd7-55aaefc3769c" xlink:href="lcid-20251231.xsd#lcid_BoardOfDirectorsOfAtievaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0e03-a48a-73a0-8fc4-c775a378ef76" xlink:to="loc_lcid_BoardOfDirectorsOfAtievaMember_019b0e05-93d7-743b-8dd7-55aaefc3769c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b0e03-a48a-7b56-b07d-e78b3ad7ab57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_56d7a75c-7404-483c-a760-cad5d1071d51" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b0e03-a48a-7b56-b07d-e78b3ad7ab57" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019b0e03-a48a-7b56-b07d-e78b3ad7ab57_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b0e03-a48a-7b56-b07d-e78b3ad7ab57" xlink:to="loc_us-gaap_RelatedPartyDomain_019b0e03-a48a-7b56-b07d-e78b3ad7ab57_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019b0e03-a48a-7f55-9c80-1b52cd6311ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b0e03-a48a-7b56-b07d-e78b3ad7ab57" xlink:to="loc_us-gaap_RelatedPartyDomain_019b0e03-a48a-7f55-9c80-1b52cd6311ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019b0e03-a48a-79ef-b191-547ac396e861" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019b0e03-a48a-7f55-9c80-1b52cd6311ad" xlink:to="loc_us-gaap_RelatedPartyMember_019b0e03-a48a-79ef-b191-547ac396e861" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_019b0e03-a48a-7a95-b7b5-0d5418a2d7a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_56d7a75c-7404-483c-a760-cad5d1071d51" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_019b0e03-a48a-7a95-b7b5-0d5418a2d7a5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019b0e03-a48a-7a95-b7b5-0d5418a2d7a5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_019b0e03-a48a-7a95-b7b5-0d5418a2d7a5" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019b0e03-a48a-7a95-b7b5-0d5418a2d7a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019b0e03-a48a-7e61-ba5f-c60221fbc333" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_019b0e03-a48a-7a95-b7b5-0d5418a2d7a5" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019b0e03-a48a-7e61-ba5f-c60221fbc333" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_VehicleProductionAgreementMember_019b0e03-a48a-71b3-bfde-b25e42f0d816" xlink:href="lcid-20251231.xsd#lcid_VehicleProductionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_019b0e03-a48a-7e61-ba5f-c60221fbc333" xlink:to="loc_lcid_VehicleProductionAgreementMember_019b0e03-a48a-71b3-bfde-b25e42f0d816" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019b0e03-a48a-766f-8473-3507d1af3214" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_56d7a75c-7404-483c-a760-cad5d1071d51" xlink:to="loc_dei_LegalEntityAxis_019b0e03-a48a-766f-8473-3507d1af3214" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019b0e03-a48a-766f-8473-3507d1af3214_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019b0e03-a48a-766f-8473-3507d1af3214" xlink:to="loc_dei_EntityDomain_019b0e03-a48a-766f-8473-3507d1af3214_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019b0e03-a48a-7338-ba11-28f2c1e1d8b6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019b0e03-a48a-766f-8473-3507d1af3214" xlink:to="loc_dei_EntityDomain_019b0e03-a48a-7338-ba11-28f2c1e1d8b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_UberMember_019b0e03-a48a-7647-86c5-0c26ca0ae085" xlink:href="lcid-20251231.xsd#lcid_UberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019b0e03-a48a-7338-ba11-28f2c1e1d8b6" xlink:to="loc_lcid_UberMember_019b0e03-a48a-7647-86c5-0c26ca0ae085" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesAuthorized_019b0e02-e000-74c6-a479-0da82e56cd9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_TemporaryEquitySharesAuthorized_019b0e02-e000-74c6-a479-0da82e56cd9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityParOrStatedValuePerShare_019b0e02-e000-755b-a4fe-a9295dc31b43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_TemporaryEquityParOrStatedValuePerShare_019b0e02-e000-755b-a4fe-a9295dc31b43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_019b0e02-e000-738f-93a5-8f36e2b69b33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_TemporaryEquitySharesOutstanding_019b0e02-e000-738f-93a5-8f36e2b69b33" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesIssued_019b0e02-e000-721d-a1a2-42a6f9533262" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_TemporaryEquitySharesIssued_019b0e02-e000-721d-a1a2-42a6f9533262" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019b0e03-a48a-7800-b9bb-545acba3737d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_019b0e03-a48a-7800-b9bb-545acba3737d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPricePerShare_019b0e03-a48a-70ed-85a2-8e0186afc7bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_SaleOfStockPricePerShare_019b0e03-a48a-70ed-85a2-8e0186afc7bc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockConsiderationToReceiveOnTransaction_019b0e03-a48a-701c-be63-18b1b01eacd6" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockConsiderationToReceiveOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_lcid_SaleOfStockConsiderationToReceiveOnTransaction_019b0e03-a48a-701c-be63-18b1b01eacd6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019b0e03-a48a-77af-8a78-95610cfe0a91" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_019b0e03-a48a-77af-8a78-95610cfe0a91" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019b0e03-a48a-7d91-89a0-01e729f49ff2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019b0e03-a48a-7d91-89a0-01e729f49ff2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockAdditionalNumberOfSharesIssuedInTransaction_019b0e03-a48a-7c45-a701-d2e8094bf0fc" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockAdditionalNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_lcid_SaleOfStockAdditionalNumberOfSharesIssuedInTransaction_019b0e03-a48a-7c45-a701-d2e8094bf0fc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentMinimumQuantityRequired_019b0e03-a48a-7da1-9cd2-23966bc6e503" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentMinimumQuantityRequired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentMinimumQuantityRequired_019b0e03-a48a-7da1-9cd2-23966bc6e503" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockArithmeticAverageDailyVolumeWeightedAveragePriceOfCommonStockConsecutiveTradingDays_019b0e03-a48a-7140-b3d3-1a405a007475" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockArithmeticAverageDailyVolumeWeightedAveragePriceOfCommonStockConsecutiveTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_lcid_SaleOfStockArithmeticAverageDailyVolumeWeightedAveragePriceOfCommonStockConsecutiveTradingDays_019b0e03-a48a-7140-b3d3-1a405a007475" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockPeriodAfterCloseWhenShareTransferIsNotPermitted_019b0e03-a48a-7429-b0cf-45796a226b5c" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockPeriodAfterCloseWhenShareTransferIsNotPermitted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_lcid_SaleOfStockPeriodAfterCloseWhenShareTransferIsNotPermitted_019b0e03-a48a-7429-b0cf-45796a226b5c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_019b0e05-93d7-75a6-8f56-64ddda241ec2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_019b0e05-93d7-75a6-8f56-64ddda241ec2" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019b0e05-93d7-7560-89ff-9188aef9ada6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019b0e02-e000-76fd-87be-7bab038eb101" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_019b0e05-93d7-7560-89ff-9188aef9ada6" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/STOCKHOLDERSEQUITYScheduleofCommonStockReservedforFutureIssuanceDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#STOCKHOLDERSEQUITYScheduleofCommonStockReservedforFutureIssuanceDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/STOCKHOLDERSEQUITYScheduleofCommonStockReservedforFutureIssuanceDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_7f88cd3b-db02-4424-8781-270191e8ecfa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_98240b62-338b-4955-8c73-31de2eacd922" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_7f88cd3b-db02-4424-8781-270191e8ecfa" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_98240b62-338b-4955-8c73-31de2eacd922" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_6aacbee7-3411-4feb-8ea8-158ca1f87b58" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_98240b62-338b-4955-8c73-31de2eacd922" xlink:to="loc_us-gaap_StatementClassOfStockAxis_6aacbee7-3411-4feb-8ea8-158ca1f87b58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_6aacbee7-3411-4feb-8ea8-158ca1f87b58_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6aacbee7-3411-4feb-8ea8-158ca1f87b58" xlink:to="loc_us-gaap_ClassOfStockDomain_6aacbee7-3411-4feb-8ea8-158ca1f87b58_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6aacbee7-3411-4feb-8ea8-158ca1f87b58" xlink:to="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PrivateWarrantsToPurchaseCommonStockMember_f4bed4e0-fab8-4b64-827e-10f35f129cff" xlink:href="lcid-20251231.xsd#lcid_PrivateWarrantsToPurchaseCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:to="loc_lcid_PrivateWarrantsToPurchaseCommonStockMember_f4bed4e0-fab8-4b64-827e-10f35f129cff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockOptionMember_6d91c579-9f93-447a-aa51-9d472823ecf2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:to="loc_us-gaap_StockOptionMember_6d91c579-9f93-447a-aa51-9d472823ecf2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_5a937224-dfce-44b3-8556-2a5482b9d5f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_5a937224-dfce-44b3-8556-2a5482b9d5f0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SharesAvailableForFutureGrantMember_2fd09cea-0863-4596-8185-2b5bb8fc24c2" xlink:href="lcid-20251231.xsd#lcid_SharesAvailableForFutureGrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:to="loc_lcid_SharesAvailableForFutureGrantMember_2fd09cea-0863-4596-8185-2b5bb8fc24c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_IfConvertedCommonSharesFrom2026NotesMember_019b0e07-0a7a-75b9-a534-90f95e31eb1d" xlink:href="lcid-20251231.xsd#lcid_IfConvertedCommonSharesFrom2026NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:to="loc_lcid_IfConvertedCommonSharesFrom2026NotesMember_019b0e07-0a7a-75b9-a534-90f95e31eb1d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_IfConvertedCommonSharesFrom2030NotesMember_019b0e07-4493-750e-a004-39487782740f" xlink:href="lcid-20251231.xsd#lcid_IfConvertedCommonSharesFrom2030NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:to="loc_lcid_IfConvertedCommonSharesFrom2030NotesMember_019b0e07-4493-750e-a004-39487782740f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_IfConvertedCommonSharesFrom2031NotesMember_019b0e07-8f0c-7be6-a793-4f82eee0d4f6" xlink:href="lcid-20251231.xsd#lcid_IfConvertedCommonSharesFrom2031NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:to="loc_lcid_IfConvertedCommonSharesFrom2031NotesMember_019b0e07-8f0c-7be6-a793-4f82eee0d4f6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_IfConvertedCommonSharesFromSeriesARedeemableConvertiblePreferredStockMember_4d3b4dac-8dfb-484e-ae4f-41a9ba6bbd8f" xlink:href="lcid-20251231.xsd#lcid_IfConvertedCommonSharesFromSeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:to="loc_lcid_IfConvertedCommonSharesFromSeriesARedeemableConvertiblePreferredStockMember_4d3b4dac-8dfb-484e-ae4f-41a9ba6bbd8f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_IfConvertedCommonSharesFromSeriesBRedeemableConvertiblePreferredStockMember_7afe65c1-852e-435f-bfad-0c21b12dc069" xlink:href="lcid-20251231.xsd#lcid_IfConvertedCommonSharesFromSeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_a05bb4dd-a3f6-4f91-be01-9a36a059db42" xlink:to="loc_lcid_IfConvertedCommonSharesFromSeriesBRedeemableConvertiblePreferredStockMember_7afe65c1-852e-435f-bfad-0c21b12dc069" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_e4596e16-d055-47a7-89aa-c1bc02199575" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_7f88cd3b-db02-4424-8781-270191e8ecfa" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_e4596e16-d055-47a7-89aa-c1bc02199575" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/STOCKBASEDAWARDSNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#STOCKBASEDAWARDSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/STOCKBASEDAWARDSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fc90dad2-7e18-4138-babc-f027fcd4d7f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fc90dad2-7e18-4138-babc-f027fcd4d7f4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019b0dd3-f8ca-7721-84d2-da2c361844c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fc90dad2-7e18-4138-babc-f027fcd4d7f4" xlink:to="loc_us-gaap_PlanNameAxis_019b0dd3-f8ca-7721-84d2-da2c361844c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019b0dd3-f8ca-7721-84d2-da2c361844c0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019b0dd3-f8ca-7721-84d2-da2c361844c0" xlink:to="loc_us-gaap_PlanNameDomain_019b0dd3-f8ca-7721-84d2-da2c361844c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019b0dd3-f8ca-729e-9296-a5bb20d1d912" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019b0dd3-f8ca-7721-84d2-da2c361844c0" xlink:to="loc_us-gaap_PlanNameDomain_019b0dd3-f8ca-729e-9296-a5bb20d1d912" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2021IncentivePlanMember_019b0dd3-f8ca-759b-906a-bcef7de9c96f" xlink:href="lcid-20251231.xsd#lcid_A2021IncentivePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019b0dd3-f8ca-729e-9296-a5bb20d1d912" xlink:to="loc_lcid_A2021IncentivePlanMember_019b0dd3-f8ca-759b-906a-bcef7de9c96f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019b0dd3-f8ca-79ae-9ccb-aa1364313476" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fc90dad2-7e18-4138-babc-f027fcd4d7f4" xlink:to="loc_srt_RangeAxis_019b0dd3-f8ca-79ae-9ccb-aa1364313476" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019b0dd3-f8ca-79ae-9ccb-aa1364313476_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019b0dd3-f8ca-79ae-9ccb-aa1364313476" xlink:to="loc_srt_RangeMember_019b0dd3-f8ca-79ae-9ccb-aa1364313476_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019b0dd3-f8ca-76c2-9e17-f98c9d28786d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019b0dd3-f8ca-79ae-9ccb-aa1364313476" xlink:to="loc_srt_RangeMember_019b0dd3-f8ca-76c2-9e17-f98c9d28786d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019b0dd3-f8ca-71ac-909b-4af1fd07500d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019b0dd3-f8ca-76c2-9e17-f98c9d28786d" xlink:to="loc_srt_MinimumMember_019b0dd3-f8ca-71ac-909b-4af1fd07500d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019b0dd3-f8ca-7a68-a9db-8687a59b2b0f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019b0dd3-f8ca-76c2-9e17-f98c9d28786d" xlink:to="loc_srt_MaximumMember_019b0dd3-f8ca-7a68-a9db-8687a59b2b0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019b0dd3-f8ca-77b1-83b9-cab4efc578b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fc90dad2-7e18-4138-babc-f027fcd4d7f4" xlink:to="loc_us-gaap_AwardTypeAxis_019b0dd3-f8ca-77b1-83b9-cab4efc578b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0dd3-f8ca-77b1-83b9-cab4efc578b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019b0dd3-f8ca-77b1-83b9-cab4efc578b0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0dd3-f8ca-77b1-83b9-cab4efc578b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0dd3-f8ca-79dc-bd42-2a825e8e4bec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019b0dd3-f8ca-77b1-83b9-cab4efc578b0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0dd3-f8ca-79dc-bd42-2a825e8e4bec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019b0dd3-f8ca-75b8-b964-fd89f2303836" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0dd3-f8ca-79dc-bd42-2a825e8e4bec" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019b0dd3-f8ca-75b8-b964-fd89f2303836" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TimeBasedRestrictedStockUnitsMember_019b0dd4-acad-7318-b96a-bcb88d3c693f" xlink:href="lcid-20251231.xsd#lcid_TimeBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0dd3-f8ca-79dc-bd42-2a825e8e4bec" xlink:to="loc_lcid_TimeBasedRestrictedStockUnitsMember_019b0dd4-acad-7318-b96a-bcb88d3c693f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PerformanceBasedRestrictedStockUnitsMember_019b0dd6-ef62-7eec-b7f5-1fc1b0d0cdab" xlink:href="lcid-20251231.xsd#lcid_PerformanceBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0dd3-f8ca-79dc-bd42-2a825e8e4bec" xlink:to="loc_lcid_PerformanceBasedRestrictedStockUnitsMember_019b0dd6-ef62-7eec-b7f5-1fc1b0d0cdab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_019b0dda-132e-7f0b-a5ee-16ff507b58a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019b0dd3-f8ca-79dc-bd42-2a825e8e4bec" xlink:to="loc_us-gaap_EmployeeStockMember_019b0dda-132e-7f0b-a5ee-16ff507b58a8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019b0dd3-f8ca-7974-a7b2-6dc7baa23580" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fc90dad2-7e18-4138-babc-f027fcd4d7f4" xlink:to="loc_us-gaap_VestingAxis_019b0dd3-f8ca-7974-a7b2-6dc7baa23580" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019b0dd3-f8ca-7974-a7b2-6dc7baa23580_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_019b0dd3-f8ca-7974-a7b2-6dc7baa23580" xlink:to="loc_us-gaap_VestingDomain_019b0dd3-f8ca-7974-a7b2-6dc7baa23580_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019b0dd3-f8ca-7219-8b5f-a8a05c61d697" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_019b0dd3-f8ca-7974-a7b2-6dc7baa23580" xlink:to="loc_us-gaap_VestingDomain_019b0dd3-f8ca-7219-8b5f-a8a05c61d697" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019b0dd3-f8ca-7a5d-8dd6-f2cdc9dc8df4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019b0dd3-f8ca-7219-8b5f-a8a05c61d697" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019b0dd3-f8ca-7a5d-8dd6-f2cdc9dc8df4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019b0dd3-f8ca-7181-9806-011efeb6e3e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019b0dd3-f8ca-7219-8b5f-a8a05c61d697" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019b0dd3-f8ca-7181-9806-011efeb6e3e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedCompensationAwardTrancheFiveMember_019b0dd7-9d06-7535-be8c-50617db65748" xlink:href="lcid-20251231.xsd#lcid_ShareBasedCompensationAwardTrancheFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019b0dd3-f8ca-7219-8b5f-a8a05c61d697" xlink:to="loc_lcid_ShareBasedCompensationAwardTrancheFiveMember_019b0dd7-9d06-7535-be8c-50617db65748" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_019b0dd4-acad-7420-903d-ce486e1b53ab" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_fc90dad2-7e18-4138-babc-f027fcd4d7f4" xlink:to="loc_srt_TitleOfIndividualAxis_019b0dd4-acad-7420-903d-ce486e1b53ab" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0dd4-acad-7420-903d-ce486e1b53ab_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_019b0dd4-acad-7420-903d-ce486e1b53ab" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0dd4-acad-7420-903d-ce486e1b53ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0dd4-acad-785d-8992-86c51de91875" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_019b0dd4-acad-7420-903d-ce486e1b53ab" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0dd4-acad-785d-8992-86c51de91875" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_FormerCEOMember_019b0dd4-acad-7803-9610-a0bfd64b574c" xlink:href="lcid-20251231.xsd#lcid_FormerCEOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019b0dd4-acad-785d-8992-86c51de91875" xlink:to="loc_lcid_FormerCEOMember_019b0dd4-acad-7803-9610-a0bfd64b574c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019b0dd3-f8ca-7ba6-a7b5-87a42ca8c114" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019b0dd3-f8ca-7ba6-a7b5-87a42ca8c114" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019b0dd3-f8ca-7071-bcb9-e1819108f3d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019b0dd3-f8ca-7071-bcb9-e1819108f3d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019b0dd3-f8ca-730b-b85f-66a08104ff43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019b0dd3-f8ca-730b-b85f-66a08104ff43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019b0dd3-f8ca-7b7a-a256-894655d07b8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019b0dd3-f8ca-7b7a-a256-894655d07b8d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019b0dd4-2647-7dd3-ae64-b6a7e1afb087" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_019b0dd4-2647-7dd3-ae64-b6a7e1afb087" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodFairValue_019b0dd4-4997-7e63-b5e4-757253e0799a" xlink:href="lcid-20251231.xsd#lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantedInPeriodFairValue_019b0dd4-4997-7e63-b5e4-757253e0799a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_019b0dd4-4997-77be-8254-cfcd5075fcc6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_019b0dd4-4997-77be-8254-cfcd5075fcc6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019b0dd4-6635-72b9-97db-51d2a5a2c637" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019b0dd4-6635-72b9-97db-51d2a5a2c637" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019b0dd4-6635-7c0a-9a9a-60c82c6b36b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019b0dd4-6635-7c0a-9a9a-60c82c6b36b9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019b0dd4-acad-711f-a210-87c96790fe5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019b0dd4-acad-711f-a210-87c96790fe5f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfVestingInstallments_019b0dd4-acad-7787-8253-0c73e6dfc4a2" xlink:href="lcid-20251231.xsd#lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfVestingInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfVestingInstallments_019b0dd4-acad-7787-8253-0c73e6dfc4a2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019b0dd4-acad-7006-9820-eb501e4d11a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019b0dd4-acad-7006-9820-eb501e4d11a4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019b0dd5-bda0-7ebd-9ed8-3108fbf3f2ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019b0dd5-bda0-7ebd-9ed8-3108fbf3f2ee" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_019b0dd6-ef62-7b3a-a0e0-766e2df85395" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_019b0dd6-ef62-7b3a-a0e0-766e2df85395" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceMeasurementPeriod_019b0dd6-ef62-7fc7-a500-8717e90fb19f" xlink:href="lcid-20251231.xsd#lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceMeasurementPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceMeasurementPeriod_019b0dd6-ef62-7fc7-a500-8717e90fb19f" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfVestingInstallmentsWithConditionsMet_019b0dd7-9d06-7f23-80ee-eaee45de34b9" xlink:href="lcid-20251231.xsd#lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfVestingInstallmentsWithConditionsMet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNumberOfVestingInstallmentsWithConditionsMet_019b0dd7-9d06-7f23-80ee-eaee45de34b9" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019b0dd7-9d06-7e4d-827b-d16ace1ddc97" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019b0dd7-9d06-7e4d-827b-d16ace1ddc97" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019b0ddc-56b7-7612-b4a5-0cff25ab439c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019b0ddc-56b7-7612-b4a5-0cff25ab439c" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_019b0dd8-eb16-7209-8740-30dac4a6973d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_019b0dd8-eb16-7209-8740-30dac4a6973d" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardGrantedPercentageOfTarget_019b0dd8-eb16-74ff-8d4c-5807d99303b0" xlink:href="lcid-20251231.xsd#lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardGrantedPercentageOfTarget"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardGrantedPercentageOfTarget_019b0dd8-eb16-74ff-8d4c-5807d99303b0" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOriginalGrantsEarnable_019b0dd8-eb16-72b5-a58a-7be2ec571124" xlink:href="lcid-20251231.xsd#lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOriginalGrantsEarnable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOriginalGrantsEarnable_019b0dd8-eb16-72b5-a58a-7be2ec571124" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardConsecutiveOfferingPeriod_019b0dda-132e-7798-9c36-a5d81571514c" xlink:href="lcid-20251231.xsd#lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardConsecutiveOfferingPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardConsecutiveOfferingPeriod_019b0dda-132e-7798-9c36-a5d81571514c" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPurchasePeriods_019b0dda-132e-7c43-b657-95453df379b2" xlink:href="lcid-20251231.xsd#lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPurchasePeriods"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPurchasePeriods_019b0dda-132e-7c43-b657-95453df379b2" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod_019b0dda-132e-7bda-bc8a-ced36e64b507" xlink:href="lcid-20251231.xsd#lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_lcid_ShareBasedCompensationArrangementByShareBasedPaymentAwardPurchasePeriod_019b0dda-132e-7bda-bc8a-ced36e64b507" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_019b0dda-132e-78a8-8832-04b320357152" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent_019b0dda-132e-78a8-8832-04b320357152" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ShareBasedPaymentArrangementNumberOfESPPResets_019be7b2-33f3-7e7c-85d6-c09c5459843c" xlink:href="lcid-20251231.xsd#lcid_ShareBasedPaymentArrangementNumberOfESPPResets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_lcid_ShareBasedPaymentArrangementNumberOfESPPResets_019be7b2-33f3-7e7c-85d6-c09c5459843c" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_019b0dda-132e-7b54-9f7a-dba0589345c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost_019b0dda-132e-7b54-9f7a-dba0589345c9" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_019b0dda-132e-721d-98e4-31dfbc5e5ae6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_019b0dda-132e-721d-98e4-31dfbc5e5ae6" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased_019b0dda-132e-74cb-b5a6-ea868505ff01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased_019b0dda-132e-74cb-b5a6-ea868505ff01" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_019b0dda-70fa-72c7-8d4c-4e1a95861c57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019b0dd3-f8ca-7e63-955d-4fafbd4ab630" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount_019b0dda-70fa-72c7-8d4c-4e1a95861c57" xlink:type="arc" order="29"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/STOCKBASEDAWARDSScheduleofStockOptionandPerformanceBasedRSUsValuationAssumptionsDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#STOCKBASEDAWARDSScheduleofStockOptionandPerformanceBasedRSUsValuationAssumptionsDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/STOCKBASEDAWARDSScheduleofStockOptionandPerformanceBasedRSUsValuationAssumptionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6f7f3ddc-d2ca-4f07-89da-9cef3f6c9621" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_cd759ff0-ae1b-4807-b435-36f6803c8192" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6f7f3ddc-d2ca-4f07-89da-9cef3f6c9621" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_cd759ff0-ae1b-4807-b435-36f6803c8192" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_a289e467-fae5-4ca1-8a34-ee78f23f87cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_cd759ff0-ae1b-4807-b435-36f6803c8192" xlink:to="loc_us-gaap_AwardTypeAxis_a289e467-fae5-4ca1-8a34-ee78f23f87cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a289e467-fae5-4ca1-8a34-ee78f23f87cd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_a289e467-fae5-4ca1-8a34-ee78f23f87cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_a289e467-fae5-4ca1-8a34-ee78f23f87cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9d75038a-b4eb-4459-a900-b84e217dc849" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_a289e467-fae5-4ca1-8a34-ee78f23f87cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9d75038a-b4eb-4459-a900-b84e217dc849" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_8b4e028c-897a-4983-86d2-531ff430345d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9d75038a-b4eb-4459-a900-b84e217dc849" xlink:to="loc_us-gaap_EmployeeStockOptionMember_8b4e028c-897a-4983-86d2-531ff430345d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PerformanceBasedRestrictedStockUnitsMember_6ea412d1-428b-4ccb-adec-0872cbb4d7b7" xlink:href="lcid-20251231.xsd#lcid_PerformanceBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_9d75038a-b4eb-4459-a900-b84e217dc849" xlink:to="loc_lcid_PerformanceBasedRestrictedStockUnitsMember_6ea412d1-428b-4ccb-adec-0872cbb4d7b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_064f2e72-314b-4fe7-a517-026e5d79fe8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6f7f3ddc-d2ca-4f07-89da-9cef3f6c9621" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_064f2e72-314b-4fe7-a517-026e5d79fe8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate_48466355-bda3-420d-93b7-3c01136e861f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6f7f3ddc-d2ca-4f07-89da-9cef3f6c9621" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageVolatilityRate_48466355-bda3-420d-93b7-3c01136e861f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_1d2df234-91c9-4bd7-bd31-3197d69bd81a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6f7f3ddc-d2ca-4f07-89da-9cef3f6c9621" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_1d2df234-91c9-4bd7-bd31-3197d69bd81a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_8ba0aec8-528a-44d0-adbb-d96828276ba6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6f7f3ddc-d2ca-4f07-89da-9cef3f6c9621" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_8ba0aec8-528a-44d0-adbb-d96828276ba6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_fbff0beb-4bf8-4ef2-9c11-fa182e586175" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6f7f3ddc-d2ca-4f07-89da-9cef3f6c9621" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_fbff0beb-4bf8-4ef2-9c11-fa182e586175" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/STOCKBASEDAWARDSScheduleofRestrictedStockUnitsActivityDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#STOCKBASEDAWARDSScheduleofRestrictedStockUnitsActivityDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/STOCKBASEDAWARDSScheduleofRestrictedStockUnitsActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_133834da-8de1-4dad-a04b-6d5f580136b7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7c829fa1-0ae8-4a96-a8af-10062e29a633" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_133834da-8de1-4dad-a04b-6d5f580136b7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7c829fa1-0ae8-4a96-a8af-10062e29a633" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_87a157a6-3074-4ce4-83ff-e612111619c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_7c829fa1-0ae8-4a96-a8af-10062e29a633" xlink:to="loc_us-gaap_AwardTypeAxis_87a157a6-3074-4ce4-83ff-e612111619c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_87a157a6-3074-4ce4-83ff-e612111619c0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_87a157a6-3074-4ce4-83ff-e612111619c0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_87a157a6-3074-4ce4-83ff-e612111619c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_93abc137-765a-4ecf-98da-2e36502e0d8e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_87a157a6-3074-4ce4-83ff-e612111619c0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_93abc137-765a-4ecf-98da-2e36502e0d8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_db934731-6861-46bf-9bee-6165ecac136a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_93abc137-765a-4ecf-98da-2e36502e0d8e" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_db934731-6861-46bf-9bee-6165ecac136a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TimeBasedRestrictedStockUnitsMember_89bc5c1c-7ae2-4c89-93f5-eddfdfc53e3e" xlink:href="lcid-20251231.xsd#lcid_TimeBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedStockUnitsRSUMember_db934731-6861-46bf-9bee-6165ecac136a" xlink:to="loc_lcid_TimeBasedRestrictedStockUnitsMember_89bc5c1c-7ae2-4c89-93f5-eddfdfc53e3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PerformanceBasedRestrictedStockUnitsMember_49214e73-a2bd-4be9-be79-9c1868215b79" xlink:href="lcid-20251231.xsd#lcid_PerformanceBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedStockUnitsRSUMember_db934731-6861-46bf-9bee-6165ecac136a" xlink:to="loc_lcid_PerformanceBasedRestrictedStockUnitsMember_49214e73-a2bd-4be9-be79-9c1868215b79" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_889d314d-e75e-4c42-a618-d0e37b3847fc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_133834da-8de1-4dad-a04b-6d5f580136b7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_889d314d-e75e-4c42-a618-d0e37b3847fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_96b0c951-4355-4e80-84fe-f742b05efc03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_889d314d-e75e-4c42-a618-d0e37b3847fc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_96b0c951-4355-4e80-84fe-f742b05efc03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_928e9909-e8d6-4fd5-a66d-fa44d6220737" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_889d314d-e75e-4c42-a618-d0e37b3847fc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_928e9909-e8d6-4fd5-a66d-fa44d6220737" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_99ce6774-0299-4d9f-b48b-d458d036b3d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_889d314d-e75e-4c42-a618-d0e37b3847fc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_99ce6774-0299-4d9f-b48b-d458d036b3d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_b228407b-ce9c-4a89-b6c9-5427c184799b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_889d314d-e75e-4c42-a618-d0e37b3847fc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_b228407b-ce9c-4a89-b6c9-5427c184799b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_ac21c165-9216-4fbd-bbe4-220cc8fc141d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7ebaf078-69ca-4d0f-9125-c6f65f46275a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_133834da-8de1-4dad-a04b-6d5f580136b7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7ebaf078-69ca-4d0f-9125-c6f65f46275a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_596c6e37-13ca-44f5-ad47-3668e29c13ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7ebaf078-69ca-4d0f-9125-c6f65f46275a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_596c6e37-13ca-44f5-ad47-3668e29c13ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_9c55172c-2d69-464a-94ae-b0268a01ad75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7ebaf078-69ca-4d0f-9125-c6f65f46275a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_9c55172c-2d69-464a-94ae-b0268a01ad75" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_39e4e252-1930-4bec-9ba2-be1c222943ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7ebaf078-69ca-4d0f-9125-c6f65f46275a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_39e4e252-1930-4bec-9ba2-be1c222943ba" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_18c6aa8f-6f7c-4991-99aa-2fe5e40a4a2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_7ebaf078-69ca-4d0f-9125-c6f65f46275a" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_18c6aa8f-6f7c-4991-99aa-2fe5e40a4a2b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_03b681b8-7a7b-4045-a9ff-e7190f134f8f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/STOCKBASEDAWARDSScheduleofStockBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#STOCKBASEDAWARDSScheduleofStockBasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/STOCKBASEDAWARDSScheduleofStockBasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_327f1959-9b16-415e-82fd-bf8791373ba3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ee5dc3b8-8233-4915-baeb-6c9fef097767" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_327f1959-9b16-415e-82fd-bf8791373ba3" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ee5dc3b8-8233-4915-baeb-6c9fef097767" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_e5bd5add-3455-42d4-9b5e-93895edd799c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_ee5dc3b8-8233-4915-baeb-6c9fef097767" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_e5bd5add-3455-42d4-9b5e-93895edd799c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_e5bd5add-3455-42d4-9b5e-93895edd799c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e5bd5add-3455-42d4-9b5e-93895edd799c" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_e5bd5add-3455-42d4-9b5e-93895edd799c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_16f31d2e-817c-45ba-93e5-f871aa8ca1e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e5bd5add-3455-42d4-9b5e-93895edd799c" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_16f31d2e-817c-45ba-93e5-f871aa8ca1e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_761cb6c9-67c9-41ac-8113-07df5de6c909" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_16f31d2e-817c-45ba-93e5-f871aa8ca1e1" xlink:to="loc_us-gaap_CostOfSalesMember_761cb6c9-67c9-41ac-8113-07df5de6c909" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_d98f0853-00f8-4d66-9970-7544c40b5029" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_16f31d2e-817c-45ba-93e5-f871aa8ca1e1" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_d98f0853-00f8-4d66-9970-7544c40b5029" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_bf724786-219f-4d64-a276-85078d611375" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_16f31d2e-817c-45ba-93e5-f871aa8ca1e1" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_bf724786-219f-4d64-a276-85078d611375" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringChargesMember_415cf927-6adb-4185-8bf9-37932117118b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringChargesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_16f31d2e-817c-45ba-93e5-f871aa8ca1e1" xlink:to="loc_us-gaap_RestructuringChargesMember_415cf927-6adb-4185-8bf9-37932117118b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_2f084600-2120-4193-976d-0e783954c40b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_327f1959-9b16-415e-82fd-bf8791373ba3" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_2f084600-2120-4193-976d-0e783954c40b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/LEASESNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#LEASESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/LEASESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_517cd413-d5c0-423e-8b15-44c7fb82fb84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_a7e737b5-d1fd-402f-abf7-7e3ff585cb38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_517cd413-d5c0-423e-8b15-44c7fb82fb84" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_a7e737b5-d1fd-402f-abf7-7e3ff585cb38" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_fc205dca-cc1f-4666-928e-f1319adfc01b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_a7e737b5-d1fd-402f-abf7-7e3ff585cb38" xlink:to="loc_srt_StatementGeographicalAxis_fc205dca-cc1f-4666-928e-f1319adfc01b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_fc205dca-cc1f-4666-928e-f1319adfc01b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_fc205dca-cc1f-4666-928e-f1319adfc01b" xlink:to="loc_srt_SegmentGeographicalDomain_fc205dca-cc1f-4666-928e-f1319adfc01b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_c22c43ed-1798-45f1-8f9c-3c1a2cae4071" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_fc205dca-cc1f-4666-928e-f1319adfc01b" xlink:to="loc_srt_SegmentGeographicalDomain_c22c43ed-1798-45f1-8f9c-3c1a2cae4071" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_CasaGrandeArizonaMember_031aca71-2b39-4f16-85d4-24ae70ee32bb" xlink:href="lcid-20251231.xsd#lcid_CasaGrandeArizonaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_c22c43ed-1798-45f1-8f9c-3c1a2cae4071" xlink:to="loc_lcid_CasaGrandeArizonaMember_031aca71-2b39-4f16-85d4-24ae70ee32bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_a78d4f8b-117b-4849-b0d5-15b5816c34c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_a7e737b5-d1fd-402f-abf7-7e3ff585cb38" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_a78d4f8b-117b-4849-b0d5-15b5816c34c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_a78d4f8b-117b-4849-b0d5-15b5816c34c1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_a78d4f8b-117b-4849-b0d5-15b5816c34c1" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_a78d4f8b-117b-4849-b0d5-15b5816c34c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_76c474fb-c41c-4af1-a96d-09fbc9e5a244" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_a78d4f8b-117b-4849-b0d5-15b5816c34c1" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_76c474fb-c41c-4af1-a96d-09fbc9e5a244" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_FailedSaleLeasebackMember_f3968319-e4f0-42a4-8510-37dcc14c6a04" xlink:href="lcid-20251231.xsd#lcid_FailedSaleLeasebackMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_76c474fb-c41c-4af1-a96d-09fbc9e5a244" xlink:to="loc_lcid_FailedSaleLeasebackMember_f3968319-e4f0-42a4-8510-37dcc14c6a04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeFinanceLeaseTermOfContract1_695308fd-eba9-471a-ac78-60690d2e8bc9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeFinanceLeaseTermOfContract1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_517cd413-d5c0-423e-8b15-44c7fb82fb84" xlink:to="loc_us-gaap_LesseeFinanceLeaseTermOfContract1_695308fd-eba9-471a-ac78-60690d2e8bc9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_a7e9b7cb-a008-49d0-a371-cd5376242ba1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_517cd413-d5c0-423e-8b15-44c7fb82fb84" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_a7e9b7cb-a008-49d0-a371-cd5376242ba1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_1ca1f1c4-614b-4659-8668-326e8a5e4653" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_517cd413-d5c0-423e-8b15-44c7fb82fb84" xlink:to="loc_us-gaap_FinanceLeaseLiability_1ca1f1c4-614b-4659-8668-326e8a5e4653" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ProceedsFromFailedSaleLeasebackTransaction_fc8df516-226d-4dbf-bb95-464078c1e42a" xlink:href="lcid-20251231.xsd#lcid_ProceedsFromFailedSaleLeasebackTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_517cd413-d5c0-423e-8b15-44c7fb82fb84" xlink:to="loc_lcid_ProceedsFromFailedSaleLeasebackTransaction_fc8df516-226d-4dbf-bb95-464078c1e42a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_c0bc3ed3-1fd8-4d76-8fb7-45463f509935" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_517cd413-d5c0-423e-8b15-44c7fb82fb84" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_c0bc3ed3-1fd8-4d76-8fb7-45463f509935" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_3bfc6e39-9f2b-46e3-9dc6-8fbaeaf9538f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_517cd413-d5c0-423e-8b15-44c7fb82fb84" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_3bfc6e39-9f2b-46e3-9dc6-8fbaeaf9538f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_6c3bc7b5-1640-4ba4-b090-821ac3beffbf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_517cd413-d5c0-423e-8b15-44c7fb82fb84" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_6c3bc7b5-1640-4ba4-b090-821ac3beffbf" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/LEASESScheduleofOperatingandFinanceLeasesDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#LEASESScheduleofOperatingandFinanceLeasesDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/LEASESScheduleofOperatingandFinanceLeasesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019b0d60-0b4d-732d-8bef-cab665ca29f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019b0d60-0b4d-7b93-ae42-845255fa42c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019b0d60-0b4d-732d-8bef-cab665ca29f2" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019b0d60-0b4d-7b93-ae42-845255fa42c7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionAxis_019b0d60-0b4d-7b65-828c-80b4d567c0e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019b0d60-0b4d-7b93-ae42-845255fa42c7" xlink:to="loc_us-gaap_AssetAcquisitionAxis_019b0d60-0b4d-7b65-828c-80b4d567c0e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_019b0d60-0b4d-7b65-828c-80b4d567c0e8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AssetAcquisitionAxis_019b0d60-0b4d-7b65-828c-80b4d567c0e8" xlink:to="loc_us-gaap_AssetAcquisitionDomain_019b0d60-0b4d-7b65-828c-80b4d567c0e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionDomain_019b0d60-0b4d-7830-ac25-29b501287521" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetAcquisitionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AssetAcquisitionAxis_019b0d60-0b4d-7b65-828c-80b4d567c0e8" xlink:to="loc_us-gaap_AssetAcquisitionDomain_019b0d60-0b4d-7830-ac25-29b501287521" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_NikolaCorporationMember_019b0d60-0b4d-79ee-b1c4-f28db9202b97" xlink:href="lcid-20251231.xsd#lcid_NikolaCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionDomain_019b0d60-0b4d-7830-ac25-29b501287521" xlink:to="loc_lcid_NikolaCorporationMember_019b0d60-0b4d-79ee-b1c4-f28db9202b97" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseDescriptionAbstract_70945f9e-237d-4feb-b162-1a6d28464a38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseDescriptionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019b0d60-0b4d-732d-8bef-cab665ca29f2" xlink:to="loc_us-gaap_LesseeOperatingLeaseDescriptionAbstract_70945f9e-237d-4feb-b162-1a6d28464a38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_b4f0ca4f-1bec-40af-9bc3-dcbe8e24a0d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeOperatingLeaseDescriptionAbstract_70945f9e-237d-4feb-b162-1a6d28464a38" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_b4f0ca4f-1bec-40af-9bc3-dcbe8e24a0d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_8f336e02-12ac-4944-abda-4c57307f028b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeOperatingLeaseDescriptionAbstract_70945f9e-237d-4feb-b162-1a6d28464a38" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_8f336e02-12ac-4944-abda-4c57307f028b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_15570ac2-2056-4dfe-8aef-db56847d226a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeOperatingLeaseDescriptionAbstract_70945f9e-237d-4feb-b162-1a6d28464a38" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_15570ac2-2056-4dfe-8aef-db56847d226a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_dc908bb4-3ff5-48c2-af45-1c1e15e78a5c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeOperatingLeaseDescriptionAbstract_70945f9e-237d-4feb-b162-1a6d28464a38" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_dc908bb4-3ff5-48c2-af45-1c1e15e78a5c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_03e5a18e-eca0-48ef-b4b6-faa6feb91009" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeOperatingLeaseDescriptionAbstract_70945f9e-237d-4feb-b162-1a6d28464a38" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_03e5a18e-eca0-48ef-b4b6-faa6feb91009" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_17e6611c-3f85-4965-88da-db1b5062b59e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeOperatingLeaseDescriptionAbstract_70945f9e-237d-4feb-b162-1a6d28464a38" xlink:to="loc_us-gaap_OperatingLeaseLiability_17e6611c-3f85-4965-88da-db1b5062b59e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeFinanceLeaseDescriptionAbstract_02fcc752-8047-417d-8739-d62f5d2e3aa5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeFinanceLeaseDescriptionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019b0d60-0b4d-732d-8bef-cab665ca29f2" xlink:to="loc_us-gaap_LesseeFinanceLeaseDescriptionAbstract_02fcc752-8047-417d-8739-d62f5d2e3aa5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_6bff3314-b7c3-41ed-8f08-ed6ec0073bce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeFinanceLeaseDescriptionAbstract_02fcc752-8047-417d-8739-d62f5d2e3aa5" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_6bff3314-b7c3-41ed-8f08-ed6ec0073bce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_77c2b98a-d721-4f88-bf2c-a2a9c461bfaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeFinanceLeaseDescriptionAbstract_02fcc752-8047-417d-8739-d62f5d2e3aa5" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_77c2b98a-d721-4f88-bf2c-a2a9c461bfaa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_c47d0a32-4601-433d-b696-52814874d8a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeFinanceLeaseDescriptionAbstract_02fcc752-8047-417d-8739-d62f5d2e3aa5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_c47d0a32-4601-433d-b696-52814874d8a2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_ea37fc87-544f-49e3-9fb0-5ecc7a7a7144" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeFinanceLeaseDescriptionAbstract_02fcc752-8047-417d-8739-d62f5d2e3aa5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_ea37fc87-544f-49e3-9fb0-5ecc7a7a7144" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_64efa06c-4a8f-457c-ace0-5472c8a98f47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeFinanceLeaseDescriptionAbstract_02fcc752-8047-417d-8739-d62f5d2e3aa5" xlink:to="loc_us-gaap_FinanceLeaseLiability_64efa06c-4a8f-457c-ace0-5472c8a98f47" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/COMMITMENTSANDCONTINGENCIESNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#COMMITMENTSANDCONTINGENCIESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/COMMITMENTSANDCONTINGENCIESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_111c6acb-6f37-4ae3-b26c-8d312ed5f539" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_4ac0e749-2889-4d83-a2d0-6276490a7a03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_111c6acb-6f37-4ae3-b26c-8d312ed5f539" xlink:to="loc_us-gaap_LossContingenciesTable_4ac0e749-2889-4d83-a2d0-6276490a7a03" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_6250e3fd-8cbd-4273-a747-d3129ce5fe82" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_4ac0e749-2889-4d83-a2d0-6276490a7a03" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_6250e3fd-8cbd-4273-a747-d3129ce5fe82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_6250e3fd-8cbd-4273-a747-d3129ce5fe82_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_6250e3fd-8cbd-4273-a747-d3129ce5fe82" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_6250e3fd-8cbd-4273-a747-d3129ce5fe82_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_7f271420-3f76-40f5-86f0-ea0d2778db1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_6250e3fd-8cbd-4273-a747-d3129ce5fe82" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_7f271420-3f76-40f5-86f0-ea0d2778db1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalAdditionsMember_09d4cf44-b19c-44f1-b878-c5650a74d40e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CapitalAdditionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_7f271420-3f76-40f5-86f0-ea0d2778db1e" xlink:to="loc_us-gaap_CapitalAdditionsMember_09d4cf44-b19c-44f1-b878-c5650a74d40e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_BatteryCellsMember_0599941b-cb71-44d8-b225-b927b0c64104" xlink:href="lcid-20251231.xsd#lcid_BatteryCellsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_7f271420-3f76-40f5-86f0-ea0d2778db1e" xlink:to="loc_lcid_BatteryCellsMember_0599941b-cb71-44d8-b225-b927b0c64104" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_05affeb6-3acc-4546-bb18-893854f60a00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_4ac0e749-2889-4d83-a2d0-6276490a7a03" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_05affeb6-3acc-4546-bb18-893854f60a00" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_05affeb6-3acc-4546-bb18-893854f60a00_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_05affeb6-3acc-4546-bb18-893854f60a00" xlink:to="loc_us-gaap_LossContingencyNatureDomain_05affeb6-3acc-4546-bb18-893854f60a00_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_1ee99307-7a2b-486e-a773-96967f607013" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_05affeb6-3acc-4546-bb18-893854f60a00" xlink:to="loc_us-gaap_LossContingencyNatureDomain_1ee99307-7a2b-486e-a773-96967f607013" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndemnificationGuaranteeMember_860bcc64-4d1a-4cd9-a3ab-822d22578bd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndemnificationGuaranteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_1ee99307-7a2b-486e-a773-96967f607013" xlink:to="loc_us-gaap_IndemnificationGuaranteeMember_860bcc64-4d1a-4cd9-a3ab-822d22578bd5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_8223bb55-038d-4943-9437-6eed584950f8" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_4ac0e749-2889-4d83-a2d0-6276490a7a03" xlink:to="loc_srt_LitigationCaseAxis_8223bb55-038d-4943-9437-6eed584950f8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_8223bb55-038d-4943-9437-6eed584950f8_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_8223bb55-038d-4943-9437-6eed584950f8" xlink:to="loc_srt_LitigationCaseTypeDomain_8223bb55-038d-4943-9437-6eed584950f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_139ce6f7-bf77-40a4-900e-4d913c8abcaf" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_8223bb55-038d-4943-9437-6eed584950f8" xlink:to="loc_srt_LitigationCaseTypeDomain_139ce6f7-bf77-40a4-900e-4d913c8abcaf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PutativeClassActionsMember_b97e0be4-ca89-4ecd-891b-c2296f52c1a6" xlink:href="lcid-20251231.xsd#lcid_PutativeClassActionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_139ce6f7-bf77-40a4-900e-4d913c8abcaf" xlink:to="loc_lcid_PutativeClassActionsMember_b97e0be4-ca89-4ecd-891b-c2296f52c1a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_OtherDerivativeActionsMember_0e287bc7-1a31-452f-abc9-cf93c768e0f7" xlink:href="lcid-20251231.xsd#lcid_OtherDerivativeActionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_139ce6f7-bf77-40a4-900e-4d913c8abcaf" xlink:to="loc_lcid_OtherDerivativeActionsMember_0e287bc7-1a31-452f-abc9-cf93c768e0f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractualObligation_1521af12-a963-483d-92cf-481fdbdb86df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractualObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_111c6acb-6f37-4ae3-b26c-8d312ed5f539" xlink:to="loc_us-gaap_ContractualObligation_1521af12-a963-483d-92cf-481fdbdb86df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligation_e7fa089e-64d9-43fd-b3a7-ce0149b938b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PurchaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_111c6acb-6f37-4ae3-b26c-8d312ed5f539" xlink:to="loc_us-gaap_PurchaseObligation_e7fa089e-64d9-43fd-b3a7-ce0149b938b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNewClaimsFiledNumber_ddf43e4e-0212-4336-a7df-52743bc3bf39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyNewClaimsFiledNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_111c6acb-6f37-4ae3-b26c-8d312ed5f539" xlink:to="loc_us-gaap_LossContingencyNewClaimsFiledNumber_ddf43e4e-0212-4336-a7df-52743bc3bf39" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LossContingencyNumberOfShareholdersClaimsFiled_b394c522-8a22-4dbb-ae13-ed420bbd3873" xlink:href="lcid-20251231.xsd#lcid_LossContingencyNumberOfShareholdersClaimsFiled"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_111c6acb-6f37-4ae3-b26c-8d312ed5f539" xlink:to="loc_lcid_LossContingencyNumberOfShareholdersClaimsFiled_b394c522-8a22-4dbb-ae13-ed420bbd3873" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LossContingencyNumberOfCasesCalledIntoSingleAction_e207b33a-d9f0-472a-97b0-53cffa2236f1" xlink:href="lcid-20251231.xsd#lcid_LossContingencyNumberOfCasesCalledIntoSingleAction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_111c6acb-6f37-4ae3-b26c-8d312ed5f539" xlink:to="loc_lcid_LossContingencyNumberOfCasesCalledIntoSingleAction_e207b33a-d9f0-472a-97b0-53cffa2236f1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_ff250b0b-6fa5-4f4e-8ebf-c69b53274545" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyEstimateOfPossibleLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_111c6acb-6f37-4ae3-b26c-8d312ed5f539" xlink:to="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_ff250b0b-6fa5-4f4e-8ebf-c69b53274545" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/INCOMETAXESNarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#INCOMETAXESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/INCOMETAXESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxContingencyLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxContingencyTable_2f28fba0-00af-4062-80d5-276712f79f06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxContingencyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:to="loc_us-gaap_IncomeTaxContingencyTable_2f28fba0-00af-4062-80d5-276712f79f06" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_9daf832f-59f0-4dee-b570-45278208f403" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_2f28fba0-00af-4062-80d5-276712f79f06" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_9daf832f-59f0-4dee-b570-45278208f403" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_9daf832f-59f0-4dee-b570-45278208f403_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_9daf832f-59f0-4dee-b570-45278208f403" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_9daf832f-59f0-4dee-b570-45278208f403_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_17ffb66f-70f0-4db9-856f-936d3bd4558e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_9daf832f-59f0-4dee-b570-45278208f403" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_17ffb66f-70f0-4db9-856f-936d3bd4558e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_8ae07446-b3f6-4f6f-9020-2e67cd47cc5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DomesticCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_17ffb66f-70f0-4db9-856f-936d3bd4558e" xlink:to="loc_us-gaap_DomesticCountryMember_8ae07446-b3f6-4f6f-9020-2e67cd47cc5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019c1976-e97d-79a6-a81b-533c89e3bc11" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DomesticCountryMember_8ae07446-b3f6-4f6f-9020-2e67cd47cc5b" xlink:to="loc_country_US_019c1976-e97d-79a6-a81b-533c89e3bc11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_922d051d-1407-40d7-b2c8-123c88e5b30c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StateAndLocalJurisdictionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_17ffb66f-70f0-4db9-856f-936d3bd4558e" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_922d051d-1407-40d7-b2c8-123c88e5b30c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_9ef86e51-395f-40bc-9ef8-7be169e04922" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_17ffb66f-70f0-4db9-856f-936d3bd4558e" xlink:to="loc_us-gaap_ForeignCountryMember_9ef86e51-395f-40bc-9ef8-7be169e04922" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_NetherlandsAndSaudiArabiaMember_019c1977-9e0f-7a70-8d01-e2d6a0d26c45" xlink:href="lcid-20251231.xsd#lcid_NetherlandsAndSaudiArabiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ForeignCountryMember_9ef86e51-395f-40bc-9ef8-7be169e04922" xlink:to="loc_lcid_NetherlandsAndSaudiArabiaMember_019c1977-9e0f-7a70-8d01-e2d6a0d26c45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAxis_4d0c3f0e-cf29-44af-ac83-3a9087db467e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxCreditCarryforwardAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeTaxContingencyTable_2f28fba0-00af-4062-80d5-276712f79f06" xlink:to="loc_us-gaap_TaxCreditCarryforwardAxis_4d0c3f0e-cf29-44af-ac83-3a9087db467e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_4d0c3f0e-cf29-44af-ac83-3a9087db467e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_4d0c3f0e-cf29-44af-ac83-3a9087db467e" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_4d0c3f0e-cf29-44af-ac83-3a9087db467e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_231bc8e2-f72a-40be-96bb-9612867c4fe3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_4d0c3f0e-cf29-44af-ac83-3a9087db467e" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_231bc8e2-f72a-40be-96bb-9612867c4fe3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchMember_8cfd9ce3-8a83-4b77-a51d-6f37d9dac7cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_231bc8e2-f72a-40be-96bb-9612867c4fe3" xlink:to="loc_us-gaap_ResearchMember_8cfd9ce3-8a83-4b77-a51d-6f37d9dac7cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_4aa22834-3671-410b-9a55-a0ea59b83c9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_4aa22834-3671-410b-9a55-a0ea59b83c9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_7dc76f87-73f1-4fdc-bd22-cae694db60f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_7dc76f87-73f1-4fdc-bd22-cae694db60f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_a1193288-da03-4d22-80b1-8946e30a483b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:to="loc_us-gaap_OperatingLossCarryforwards_a1193288-da03-4d22-80b1-8946e30a483b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_77dbb208-9c40-403e-b4a6-dd1224d4e296" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxCreditCarryforwardAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_77dbb208-9c40-403e-b4a6-dd1224d4e296" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_OperatingLossCarryforwardsAmountNullifiedByOwnershipChange_9cc7ba17-f30c-42ae-bc0d-5beee676fba8" xlink:href="lcid-20251231.xsd#lcid_OperatingLossCarryforwardsAmountNullifiedByOwnershipChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:to="loc_lcid_OperatingLossCarryforwardsAmountNullifiedByOwnershipChange_9cc7ba17-f30c-42ae-bc0d-5beee676fba8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_TaxCreditCarryforwardsResearchAndDevelopmentAmountNullifiedByOwnershipChange_632aeabb-4851-4e27-aa46-73f92050033f" xlink:href="lcid-20251231.xsd#lcid_TaxCreditCarryforwardsResearchAndDevelopmentAmountNullifiedByOwnershipChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:to="loc_lcid_TaxCreditCarryforwardsResearchAndDevelopmentAmountNullifiedByOwnershipChange_632aeabb-4851-4e27-aa46-73f92050033f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_019b4b43-3d1c-7cf7-a847-8199dab80147" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_019b4b43-3d1c-7cf7-a847-8199dab80147" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_10c38bc6-e5c5-4c32-a001-9372f56acabf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_10c38bc6-e5c5-4c32-a001-9372f56acabf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_80fcd90d-79cd-4e38-9468-ba654668e50c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxContingencyLineItems_4436992b-60c9-491a-af2f-59a475ea4d10" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_80fcd90d-79cd-4e38-9468-ba654668e50c" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/NETLOSSPERSHAREScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#NETLOSSPERSHAREScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/NETLOSSPERSHAREScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_38e5d04a-a8d0-4226-a697-725d9c2089f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_1f3748f1-4aec-4e30-945b-37b995f57295" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_38e5d04a-a8d0-4226-a697-725d9c2089f7" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_1f3748f1-4aec-4e30-945b-37b995f57295" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_5c5ee93a-0519-4af0-89de-0b89ab83bdf8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_1f3748f1-4aec-4e30-945b-37b995f57295" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_5c5ee93a-0519-4af0-89de-0b89ab83bdf8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_5c5ee93a-0519-4af0-89de-0b89ab83bdf8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_5c5ee93a-0519-4af0-89de-0b89ab83bdf8" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_5c5ee93a-0519-4af0-89de-0b89ab83bdf8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_5c5ee93a-0519-4af0-89de-0b89ab83bdf8" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PrivatePlacementWarrantsToPurchaseCommonStockMember_d28a07f1-1877-42f2-9fcd-e26a26b25ea0" xlink:href="lcid-20251231.xsd#lcid_PrivatePlacementWarrantsToPurchaseCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:to="loc_lcid_PrivatePlacementWarrantsToPurchaseCommonStockMember_d28a07f1-1877-42f2-9fcd-e26a26b25ea0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_d17951ae-0dc9-4f25-aa97-1c268fb16eb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:to="loc_us-gaap_EmployeeStockOptionMember_d17951ae-0dc9-4f25-aa97-1c268fb16eb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_fe60e8c9-0cb9-40ca-b96c-b4ff5d5995fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_fe60e8c9-0cb9-40ca-b96c-b4ff5d5995fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_970332d0-ef58-4117-9b53-06f3c3ef64b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:to="loc_us-gaap_EmployeeStockMember_970332d0-ef58-4117-9b53-06f3c3ef64b6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_IfConvertedCommonSharesFrom2026NotesMember_019b0d47-edc7-7ce1-9f39-e806e2e1fead" xlink:href="lcid-20251231.xsd#lcid_IfConvertedCommonSharesFrom2026NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:to="loc_lcid_IfConvertedCommonSharesFrom2026NotesMember_019b0d47-edc7-7ce1-9f39-e806e2e1fead" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_IfConvertedCommonSharesFrom2030NotesMember_019b0d48-a5a4-70a8-a97a-109f8e565d92" xlink:href="lcid-20251231.xsd#lcid_IfConvertedCommonSharesFrom2030NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:to="loc_lcid_IfConvertedCommonSharesFrom2030NotesMember_019b0d48-a5a4-70a8-a97a-109f8e565d92" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_IfConvertedCommonSharesFrom2031NotesMember_019b0d4a-14c6-7357-96aa-d8ebb28b7328" xlink:href="lcid-20251231.xsd#lcid_IfConvertedCommonSharesFrom2031NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:to="loc_lcid_IfConvertedCommonSharesFrom2031NotesMember_019b0d4a-14c6-7357-96aa-d8ebb28b7328" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_IfConvertedCommonSharesFromSeriesARedeemableConvertiblePreferredStockMember_906570ed-9c33-49bb-9ec0-33dc04ade6c2" xlink:href="lcid-20251231.xsd#lcid_IfConvertedCommonSharesFromSeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:to="loc_lcid_IfConvertedCommonSharesFromSeriesARedeemableConvertiblePreferredStockMember_906570ed-9c33-49bb-9ec0-33dc04ade6c2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_IfConvertedCommonSharesFromSeriesBRedeemableConvertiblePreferredStockMember_434e3bbe-202b-4542-be8f-d4a986c8efbd" xlink:href="lcid-20251231.xsd#lcid_IfConvertedCommonSharesFromSeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_dc1e72f8-2caa-4d00-be23-7368a3931df8" xlink:to="loc_lcid_IfConvertedCommonSharesFromSeriesBRedeemableConvertiblePreferredStockMember_434e3bbe-202b-4542-be8f-d4a986c8efbd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_e4b8d1b3-bba9-499d-857d-99d7b13f1676" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_38e5d04a-a8d0-4226-a697-725d9c2089f7" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_e4b8d1b3-bba9-499d-857d-99d7b13f1676" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/NETLOSSPERSHARENarrativeDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#NETLOSSPERSHARENarrativeDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/NETLOSSPERSHARENarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_e356e6f7-b83f-4ae4-9e3d-52070e88742e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_8659b631-5fdc-4934-ad5f-70c47bf8d10f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_e356e6f7-b83f-4ae4-9e3d-52070e88742e" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_8659b631-5fdc-4934-ad5f-70c47bf8d10f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_575326c4-4603-463a-a992-2e4e69faf438" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_8659b631-5fdc-4934-ad5f-70c47bf8d10f" xlink:to="loc_us-gaap_AwardTypeAxis_575326c4-4603-463a-a992-2e4e69faf438" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_575326c4-4603-463a-a992-2e4e69faf438_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_575326c4-4603-463a-a992-2e4e69faf438" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_575326c4-4603-463a-a992-2e4e69faf438_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1ad6207f-77d1-4c88-8e1b-2a68018c30e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_575326c4-4603-463a-a992-2e4e69faf438" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1ad6207f-77d1-4c88-8e1b-2a68018c30e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_74835f53-cb89-488f-a17f-7860a266777d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1ad6207f-77d1-4c88-8e1b-2a68018c30e0" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_74835f53-cb89-488f-a17f-7860a266777d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares_32133077-b55f-4616-be3b-05eae64b9581" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_e356e6f7-b83f-4ae4-9e3d-52070e88742e" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares_32133077-b55f-4616-be3b-05eae64b9581" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSLeasesDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSLeasesDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSLeasesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_91c518dd-ed84-44eb-9395-c5ec3e4f6ef0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f9ab34d8-4a64-49c8-ad36-8f9edb676bc1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_91c518dd-ed84-44eb-9395-c5ec3e4f6ef0" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f9ab34d8-4a64-49c8-ad36-8f9edb676bc1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_c619e766-c4ae-4255-b738-760591b125e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f9ab34d8-4a64-49c8-ad36-8f9edb676bc1" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_c619e766-c4ae-4255-b738-760591b125e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_c619e766-c4ae-4255-b738-760591b125e1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_c619e766-c4ae-4255-b738-760591b125e1" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_c619e766-c4ae-4255-b738-760591b125e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_c34a6c29-79be-4b10-a31e-669e4fe2d9d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_c619e766-c4ae-4255-b738-760591b125e1" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_c34a6c29-79be-4b10-a31e-669e4fe2d9d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_KingAbdullahEconomicCityLeaseAgreementMember_157cb5cb-c881-4bb8-8ca7-677cdf386909" xlink:href="lcid-20251231.xsd#lcid_KingAbdullahEconomicCityLeaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_c34a6c29-79be-4b10-a31e-669e4fe2d9d3" xlink:to="loc_lcid_KingAbdullahEconomicCityLeaseAgreementMember_157cb5cb-c881-4bb8-8ca7-677cdf386909" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_KingAbdullahFinancialDistrictDevelopmentAndManagementCompanyMember_83df0cb0-897c-4427-9f32-d53150ba3cca" xlink:href="lcid-20251231.xsd#lcid_KingAbdullahFinancialDistrictDevelopmentAndManagementCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_c34a6c29-79be-4b10-a31e-669e4fe2d9d3" xlink:to="loc_lcid_KingAbdullahFinancialDistrictDevelopmentAndManagementCompanyMember_83df0cb0-897c-4427-9f32-d53150ba3cca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_483b7c60-7ca5-431f-9521-29b02842a70c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f9ab34d8-4a64-49c8-ad36-8f9edb676bc1" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_483b7c60-7ca5-431f-9521-29b02842a70c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_483b7c60-7ca5-431f-9521-29b02842a70c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_483b7c60-7ca5-431f-9521-29b02842a70c" xlink:to="loc_us-gaap_RelatedPartyDomain_483b7c60-7ca5-431f-9521-29b02842a70c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_9551c580-8f9c-4bf6-b310-ff56a5691582" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_483b7c60-7ca5-431f-9521-29b02842a70c" xlink:to="loc_us-gaap_RelatedPartyDomain_9551c580-8f9c-4bf6-b310-ff56a5691582" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_cb041fc1-c43c-447c-be54-8b12fc82c084" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_9551c580-8f9c-4bf6-b310-ff56a5691582" xlink:to="loc_us-gaap_RelatedPartyMember_cb041fc1-c43c-447c-be54-8b12fc82c084" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeaseTermOfContract_d1885f32-1ceb-4063-a1d5-62591e681d33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LessorOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_91c518dd-ed84-44eb-9395-c5ec3e4f6ef0" xlink:to="loc_us-gaap_LessorOperatingLeaseTermOfContract_d1885f32-1ceb-4063-a1d5-62591e681d33" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_9152b6ea-3f96-491f-8b42-15da95ab56f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_91c518dd-ed84-44eb-9395-c5ec3e4f6ef0" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_9152b6ea-3f96-491f-8b42-15da95ab56f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_c5f21cd5-7f47-4584-ab45-4807ba5d33e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_91c518dd-ed84-44eb-9395-c5ec3e4f6ef0" xlink:to="loc_us-gaap_OperatingLeaseLiability_c5f21cd5-7f47-4584-ab45-4807ba5d33e2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSSIDFLoanAgreementDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSSIDFLoanAgreementDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSSIDFLoanAgreementDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_db3b3fcb-bb76-4930-b329-9ad92ed89578" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3a576ed7-4d63-4974-ab6c-c83139c042d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_db3b3fcb-bb76-4930-b329-9ad92ed89578" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3a576ed7-4d63-4974-ab6c-c83139c042d6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_9cbd48c3-6a11-4e78-9b99-d07cca846441" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3a576ed7-4d63-4974-ab6c-c83139c042d6" xlink:to="loc_us-gaap_DebtInstrumentAxis_9cbd48c3-6a11-4e78-9b99-d07cca846441" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_9cbd48c3-6a11-4e78-9b99-d07cca846441_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_9cbd48c3-6a11-4e78-9b99-d07cca846441" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_9cbd48c3-6a11-4e78-9b99-d07cca846441_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_20c69ae6-2c80-47ff-bd68-0bab90562674" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_9cbd48c3-6a11-4e78-9b99-d07cca846441" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_20c69ae6-2c80-47ff-bd68-0bab90562674" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaudiIndustrialDevelopmentFundLoanAgreementMember_be560fb0-25be-4cf2-bb49-4b94a8e8ace7" xlink:href="lcid-20251231.xsd#lcid_SaudiIndustrialDevelopmentFundLoanAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_20c69ae6-2c80-47ff-bd68-0bab90562674" xlink:to="loc_lcid_SaudiIndustrialDevelopmentFundLoanAgreementMember_be560fb0-25be-4cf2-bb49-4b94a8e8ace7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_08c3fdbe-d86a-4ad1-b9c1-89e90f6a066a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3a576ed7-4d63-4974-ab6c-c83139c042d6" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_08c3fdbe-d86a-4ad1-b9c1-89e90f6a066a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_08c3fdbe-d86a-4ad1-b9c1-89e90f6a066a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_08c3fdbe-d86a-4ad1-b9c1-89e90f6a066a" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_08c3fdbe-d86a-4ad1-b9c1-89e90f6a066a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_66d8795d-0d57-4f56-aa5b-e78e6f3cb6ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_08c3fdbe-d86a-4ad1-b9c1-89e90f6a066a" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_66d8795d-0d57-4f56-aa5b-e78e6f3cb6ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SIDFLoanAgreementMember_fd4e5f38-d63a-4020-87ef-286a02104c7b" xlink:href="lcid-20251231.xsd#lcid_SIDFLoanAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_66d8795d-0d57-4f56-aa5b-e78e6f3cb6ee" xlink:to="loc_lcid_SIDFLoanAgreementMember_fd4e5f38-d63a-4020-87ef-286a02104c7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3e7e4b31-9855-4ee6-906c-61cba7caf334" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3a576ed7-4d63-4974-ab6c-c83139c042d6" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3e7e4b31-9855-4ee6-906c-61cba7caf334" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_3e7e4b31-9855-4ee6-906c-61cba7caf334_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3e7e4b31-9855-4ee6-906c-61cba7caf334" xlink:to="loc_us-gaap_RelatedPartyDomain_3e7e4b31-9855-4ee6-906c-61cba7caf334_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_ef9ee0de-f680-4b56-bc01-80040ded2a62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3e7e4b31-9855-4ee6-906c-61cba7caf334" xlink:to="loc_us-gaap_RelatedPartyDomain_ef9ee0de-f680-4b56-bc01-80040ded2a62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_be752910-033e-44b3-b007-8c3cc41a4582" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_ef9ee0de-f680-4b56-bc01-80040ded2a62" xlink:to="loc_us-gaap_RelatedPartyMember_be752910-033e-44b3-b007-8c3cc41a4582" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_bd1be855-0096-42be-ba9b-0f37b81444c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_db3b3fcb-bb76-4930-b329-9ad92ed89578" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_bd1be855-0096-42be-ba9b-0f37b81444c1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSMISAAgreementsDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSMISAAgreementsDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSMISAAgreementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_703ae045-27c4-420a-bb89-3f7611bde101" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_bbd72b66-77b4-47e5-a18f-5f3788e1a7f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_703ae045-27c4-420a-bb89-3f7611bde101" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_bbd72b66-77b4-47e5-a18f-5f3788e1a7f9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_d499862a-2e6c-4646-8ece-7e529964e72e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_bbd72b66-77b4-47e5-a18f-5f3788e1a7f9" xlink:to="loc_srt_CounterpartyNameAxis_d499862a-2e6c-4646-8ece-7e529964e72e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_d499862a-2e6c-4646-8ece-7e529964e72e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_d499862a-2e6c-4646-8ece-7e529964e72e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_d499862a-2e6c-4646-8ece-7e529964e72e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_21490f71-b03e-46b8-a808-fdb52be8c912" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_d499862a-2e6c-4646-8ece-7e529964e72e" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_21490f71-b03e-46b8-a808-fdb52be8c912" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MinistryOfInvestmentOfSaudiArabiaMember_fd67292c-b85a-496e-9096-d04b56f6fa6d" xlink:href="lcid-20251231.xsd#lcid_MinistryOfInvestmentOfSaudiArabiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_21490f71-b03e-46b8-a808-fdb52be8c912" xlink:to="loc_lcid_MinistryOfInvestmentOfSaudiArabiaMember_fd67292c-b85a-496e-9096-d04b56f6fa6d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_b61d2594-0887-48d7-b15e-880a6388c46d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_bbd72b66-77b4-47e5-a18f-5f3788e1a7f9" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_b61d2594-0887-48d7-b15e-880a6388c46d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_b61d2594-0887-48d7-b15e-880a6388c46d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_b61d2594-0887-48d7-b15e-880a6388c46d" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_b61d2594-0887-48d7-b15e-880a6388c46d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_701b99a7-e642-4886-9073-23246b37e4f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_b61d2594-0887-48d7-b15e-880a6388c46d" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_701b99a7-e642-4886-9073-23246b37e4f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MISAAgreementAMP2Member_2695c244-2d4d-4128-ae67-52aa7fb4bb67" xlink:href="lcid-20251231.xsd#lcid_MISAAgreementAMP2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_701b99a7-e642-4886-9073-23246b37e4f3" xlink:to="loc_lcid_MISAAgreementAMP2Member_2695c244-2d4d-4128-ae67-52aa7fb4bb67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_MISAAgreementGovernmentGrantMember_9af14f0d-197f-4b67-aa35-1f7fc54c6bed" xlink:href="lcid-20251231.xsd#lcid_MISAAgreementGovernmentGrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_701b99a7-e642-4886-9073-23246b37e4f3" xlink:to="loc_lcid_MISAAgreementGovernmentGrantMember_9af14f0d-197f-4b67-aa35-1f7fc54c6bed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_5281c1f3-4c0a-46ee-950f-e2a857e87bed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_bbd72b66-77b4-47e5-a18f-5f3788e1a7f9" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_5281c1f3-4c0a-46ee-950f-e2a857e87bed" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_5281c1f3-4c0a-46ee-950f-e2a857e87bed_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_5281c1f3-4c0a-46ee-950f-e2a857e87bed" xlink:to="loc_us-gaap_RelatedPartyDomain_5281c1f3-4c0a-46ee-950f-e2a857e87bed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_8f02d848-8ae5-49db-bf40-240c7ad19eb9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_5281c1f3-4c0a-46ee-950f-e2a857e87bed" xlink:to="loc_us-gaap_RelatedPartyDomain_8f02d848-8ae5-49db-bf40-240c7ad19eb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_c3953df8-63eb-4d8f-9d77-718c05d769bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_8f02d848-8ae5-49db-bf40-240c7ad19eb9" xlink:to="loc_us-gaap_RelatedPartyMember_c3953df8-63eb-4d8f-9d77-718c05d769bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_f0088f10-b663-4af8-a19c-cc5bc638e422" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_bbd72b66-77b4-47e5-a18f-5f3788e1a7f9" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_f0088f10-b663-4af8-a19c-cc5bc638e422" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_f0088f10-b663-4af8-a19c-cc5bc638e422_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_f0088f10-b663-4af8-a19c-cc5bc638e422" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_f0088f10-b663-4af8-a19c-cc5bc638e422_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_080ba75e-b927-4d25-828b-38f1d3e3875f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_f0088f10-b663-4af8-a19c-cc5bc638e422" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_080ba75e-b927-4d25-828b-38f1d3e3875f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_8fb58020-8e6c-4e16-8ec1-07d25f1d4d68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_080ba75e-b927-4d25-828b-38f1d3e3875f" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_8fb58020-8e6c-4e16-8ec1-07d25f1d4d68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2a3e9595-1381-471a-919d-823965503584" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_bbd72b66-77b4-47e5-a18f-5f3788e1a7f9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2a3e9595-1381-471a-919d-823965503584" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2a3e9595-1381-471a-919d-823965503584_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2a3e9595-1381-471a-919d-823965503584" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2a3e9595-1381-471a-919d-823965503584_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_95da1126-d986-4145-bfad-2dd1d350d3bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2a3e9595-1381-471a-919d-823965503584" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_95da1126-d986-4145-bfad-2dd1d350d3bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AMP2FixedAssetAndAMP2ConstructionInProgressBalanceMember_4c97d021-c3df-4822-bcfb-2a8cefeaf3eb" xlink:href="lcid-20251231.xsd#lcid_AMP2FixedAssetAndAMP2ConstructionInProgressBalanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_95da1126-d986-4145-bfad-2dd1d350d3bb" xlink:to="loc_lcid_AMP2FixedAssetAndAMP2ConstructionInProgressBalanceMember_4c97d021-c3df-4822-bcfb-2a8cefeaf3eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationAxis_2817b039-d896-4170-8fe4-c30ae4b913d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_bbd72b66-77b4-47e5-a18f-5f3788e1a7f9" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationAxis_2817b039-d896-4170-8fe4-c30ae4b913d0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain_2817b039-d896-4170-8fe4-c30ae4b913d0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationAxis_2817b039-d896-4170-8fe4-c30ae4b913d0" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain_2817b039-d896-4170-8fe4-c30ae4b913d0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain_7946a602-8189-4731-9747-4e4d0c8baf1f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationAxis_2817b039-d896-4170-8fe4-c30ae4b913d0" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain_7946a602-8189-4731-9747-4e4d0c8baf1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_f97dab19-658b-44c6-a8a7-0df5bd4ba841" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementOfFinancialPositionLocationActivityCapitalizationDomain_7946a602-8189-4731-9747-4e4d0c8baf1f" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_f97dab19-658b-44c6-a8a7-0df5bd4ba841" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionThresholdPeriodForSuspensionOfFundingOperationCommencement_50ecae01-c08d-4693-b4c4-93973fb917af" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionThresholdPeriodForSuspensionOfFundingOperationCommencement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_703ae045-27c4-420a-bb89-3f7611bde101" xlink:to="loc_lcid_RelatedPartyTransactionThresholdPeriodForSuspensionOfFundingOperationCommencement_50ecae01-c08d-4693-b4c4-93973fb917af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionThresholdPeriodForSuspensionOfFundingAttainmentOfAgreedScopeOfOperations_a6bc9fc9-3160-4cde-8b88-40db8b440efc" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionThresholdPeriodForSuspensionOfFundingAttainmentOfAgreedScopeOfOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_703ae045-27c4-420a-bb89-3f7611bde101" xlink:to="loc_lcid_RelatedPartyTransactionThresholdPeriodForSuspensionOfFundingAttainmentOfAgreedScopeOfOperations_a6bc9fc9-3160-4cde-8b88-40db8b440efc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_cf08b5b8-3232-46cf-86d8-1a25a5a2279d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_703ae045-27c4-420a-bb89-3f7611bde101" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_cf08b5b8-3232-46cf-86d8-1a25a5a2279d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSGIBFacilityAgreementDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSGIBFacilityAgreementDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSGIBFacilityAgreementDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_9821e221-64c8-490f-a8ef-6b8f70294f29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_74c6e223-7068-4d91-8ae2-d4f5ac8f9aa4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_9821e221-64c8-490f-a8ef-6b8f70294f29" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_74c6e223-7068-4d91-8ae2-d4f5ac8f9aa4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_faa11dd3-b43a-49d3-b73a-94f332bdaa02" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_74c6e223-7068-4d91-8ae2-d4f5ac8f9aa4" xlink:to="loc_us-gaap_DebtInstrumentAxis_faa11dd3-b43a-49d3-b73a-94f332bdaa02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_faa11dd3-b43a-49d3-b73a-94f332bdaa02_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_faa11dd3-b43a-49d3-b73a-94f332bdaa02" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_faa11dd3-b43a-49d3-b73a-94f332bdaa02_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c43086cf-1605-431e-a815-417ebc75a1ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_faa11dd3-b43a-49d3-b73a-94f332bdaa02" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c43086cf-1605-431e-a815-417ebc75a1ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_GIBFacilityAgreementMember_c70ac676-043e-42d0-b472-1c2062c47f62" xlink:href="lcid-20251231.xsd#lcid_GIBFacilityAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c43086cf-1605-431e-a815-417ebc75a1ad" xlink:to="loc_lcid_GIBFacilityAgreementMember_c70ac676-043e-42d0-b472-1c2062c47f62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023GIBCreditFacilityMember_4e36a154-dd5c-413f-aa04-ecc31d235bee" xlink:href="lcid-20251231.xsd#lcid_A2023GIBCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c43086cf-1605-431e-a815-417ebc75a1ad" xlink:to="loc_lcid_A2023GIBCreditFacilityMember_4e36a154-dd5c-413f-aa04-ecc31d235bee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023AmendedGIBFacilityAgreementMember_019b0d34-2d18-7a1c-9073-0937cbffa1b2" xlink:href="lcid-20251231.xsd#lcid_A2023AmendedGIBFacilityAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c43086cf-1605-431e-a815-417ebc75a1ad" xlink:to="loc_lcid_A2023AmendedGIBFacilityAgreementMember_019b0d34-2d18-7a1c-9073-0937cbffa1b2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2025GIBCreditFacilityMember_019b0d34-2d18-76fd-8fd6-93fa32f0549c" xlink:href="lcid-20251231.xsd#lcid_A2025GIBCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c43086cf-1605-431e-a815-417ebc75a1ad" xlink:to="loc_lcid_A2025GIBCreditFacilityMember_019b0d34-2d18-76fd-8fd6-93fa32f0549c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_41772bcd-b63e-4256-93a3-9260e24c872a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_74c6e223-7068-4d91-8ae2-d4f5ac8f9aa4" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_41772bcd-b63e-4256-93a3-9260e24c872a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_41772bcd-b63e-4256-93a3-9260e24c872a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_41772bcd-b63e-4256-93a3-9260e24c872a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_41772bcd-b63e-4256-93a3-9260e24c872a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_43f5f22d-96ce-48c7-8299-bc1001eae1db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_41772bcd-b63e-4256-93a3-9260e24c872a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_43f5f22d-96ce-48c7-8299-bc1001eae1db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_5833da06-f93b-4806-84ed-62e93e42964c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_43f5f22d-96ce-48c7-8299-bc1001eae1db" xlink:to="loc_us-gaap_LineOfCreditMember_5833da06-f93b-4806-84ed-62e93e42964c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6933a8a8-7318-4a47-899c-2b2339771c09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_74c6e223-7068-4d91-8ae2-d4f5ac8f9aa4" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6933a8a8-7318-4a47-899c-2b2339771c09" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_6933a8a8-7318-4a47-899c-2b2339771c09_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6933a8a8-7318-4a47-899c-2b2339771c09" xlink:to="loc_us-gaap_RelatedPartyDomain_6933a8a8-7318-4a47-899c-2b2339771c09_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_68e7133c-58e2-4851-bbb0-3bfe91826d88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6933a8a8-7318-4a47-899c-2b2339771c09" xlink:to="loc_us-gaap_RelatedPartyDomain_68e7133c-58e2-4851-bbb0-3bfe91826d88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_58113deb-2f64-4364-8806-5879ff4efd80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_68e7133c-58e2-4851-bbb0-3bfe91826d88" xlink:to="loc_us-gaap_RelatedPartyMember_58113deb-2f64-4364-8806-5879ff4efd80" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_f22dd7a7-b4d5-44a7-b581-84f3324c692a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_74c6e223-7068-4d91-8ae2-d4f5ac8f9aa4" xlink:to="loc_us-gaap_CreditFacilityAxis_f22dd7a7-b4d5-44a7-b581-84f3324c692a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_f22dd7a7-b4d5-44a7-b581-84f3324c692a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_f22dd7a7-b4d5-44a7-b581-84f3324c692a" xlink:to="loc_us-gaap_CreditFacilityDomain_f22dd7a7-b4d5-44a7-b581-84f3324c692a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_786aa641-a83d-4ac8-a7b5-95400a6367a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_f22dd7a7-b4d5-44a7-b581-84f3324c692a" xlink:to="loc_us-gaap_CreditFacilityDomain_786aa641-a83d-4ac8-a7b5-95400a6367a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_f2589c70-35cd-4961-a918-94647e47bb6a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_786aa641-a83d-4ac8-a7b5-95400a6367a8" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_f2589c70-35cd-4961-a918-94647e47bb6a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LineOfCreditFacilityNumberOfFacilities_cfd6cc72-c6ac-4d36-b225-4e692342972c" xlink:href="lcid-20251231.xsd#lcid_LineOfCreditFacilityNumberOfFacilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_9821e221-64c8-490f-a8ef-6b8f70294f29" xlink:to="loc_lcid_LineOfCreditFacilityNumberOfFacilities_cfd6cc72-c6ac-4d36-b225-4e692342972c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_ec661708-2889-4297-a713-842ed1e5c4ad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_9821e221-64c8-490f-a8ef-6b8f70294f29" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_ec661708-2889-4297-a713-842ed1e5c4ad" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSConstructionServiceContractDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSConstructionServiceContractDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSConstructionServiceContractDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_6721096f-0b00-4ef2-aa26-e7ef21d1d785" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_57a0ba25-00f0-4455-957a-913f46e06415" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_6721096f-0b00-4ef2-aa26-e7ef21d1d785" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_57a0ba25-00f0-4455-957a-913f46e06415" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_126a577d-1899-466e-b12f-e3ea4bb87cd7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_57a0ba25-00f0-4455-957a-913f46e06415" xlink:to="loc_srt_CounterpartyNameAxis_126a577d-1899-466e-b12f-e3ea4bb87cd7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_126a577d-1899-466e-b12f-e3ea4bb87cd7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_126a577d-1899-466e-b12f-e3ea4bb87cd7" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_126a577d-1899-466e-b12f-e3ea4bb87cd7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_e057757e-cf5c-4670-b9f6-742e5e348446" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_126a577d-1899-466e-b12f-e3ea4bb87cd7" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_e057757e-cf5c-4670-b9f6-742e5e348446" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AlBawaniCompanyLimitedMember_324f6349-d55a-4744-851d-fdca10017f0e" xlink:href="lcid-20251231.xsd#lcid_AlBawaniCompanyLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_e057757e-cf5c-4670-b9f6-742e5e348446" xlink:to="loc_lcid_AlBawaniCompanyLimitedMember_324f6349-d55a-4744-851d-fdca10017f0e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_963fa303-67d2-4663-b59f-d8c76cd28d3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_57a0ba25-00f0-4455-957a-913f46e06415" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_963fa303-67d2-4663-b59f-d8c76cd28d3e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_963fa303-67d2-4663-b59f-d8c76cd28d3e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_963fa303-67d2-4663-b59f-d8c76cd28d3e" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_963fa303-67d2-4663-b59f-d8c76cd28d3e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_655eba5d-dca3-4e3f-8c75-418cdbfecbce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_963fa303-67d2-4663-b59f-d8c76cd28d3e" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_655eba5d-dca3-4e3f-8c75-418cdbfecbce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ConstructionServiceContractMember_a560acfc-42cc-4cc2-a124-055e8cbd8c5b" xlink:href="lcid-20251231.xsd#lcid_ConstructionServiceContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_655eba5d-dca3-4e3f-8c75-418cdbfecbce" xlink:to="loc_lcid_ConstructionServiceContractMember_a560acfc-42cc-4cc2-a124-055e8cbd8c5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d0d0eb0c-0be2-43e7-ab2e-0e2766782aad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_57a0ba25-00f0-4455-957a-913f46e06415" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d0d0eb0c-0be2-43e7-ab2e-0e2766782aad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_d0d0eb0c-0be2-43e7-ab2e-0e2766782aad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d0d0eb0c-0be2-43e7-ab2e-0e2766782aad" xlink:to="loc_us-gaap_RelatedPartyDomain_d0d0eb0c-0be2-43e7-ab2e-0e2766782aad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_1ebd7ac3-93ce-4416-9f00-a90d29e83d70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d0d0eb0c-0be2-43e7-ab2e-0e2766782aad" xlink:to="loc_us-gaap_RelatedPartyDomain_1ebd7ac3-93ce-4416-9f00-a90d29e83d70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_eb737e71-1bbc-4ceb-b282-0b708a9f675c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_1ebd7ac3-93ce-4416-9f00-a90d29e83d70" xlink:to="loc_us-gaap_RelatedPartyMember_eb737e71-1bbc-4ceb-b282-0b708a9f675c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_c52186d9-8bad-451e-940f-0a37905ffd1b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_6721096f-0b00-4ef2-aa26-e7ef21d1d785" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_c52186d9-8bad-451e-940f-0a37905ffd1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_6625d560-d544-4e09-b724-22364e0ed678" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_6721096f-0b00-4ef2-aa26-e7ef21d1d785" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_6625d560-d544-4e09-b724-22364e0ed678" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionAdvancePayments_1a9e71b0-1711-4192-a26b-3e5e310ff63a" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionAdvancePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_6721096f-0b00-4ef2-aa26-e7ef21d1d785" xlink:to="loc_lcid_RelatedPartyTransactionAdvancePayments_1a9e71b0-1711-4192-a26b-3e5e310ff63a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSSubscriptionAgreementsDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSSubscriptionAgreementsDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSSubscriptionAgreementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_d354e7fe-999a-48b8-897c-f22df7f57938" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2275ace-1474-48bf-a60e-5737da689555" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d354e7fe-999a-48b8-897c-f22df7f57938" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2275ace-1474-48bf-a60e-5737da689555" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_ab78a38e-97c3-4f6e-8d28-7be6040ed1b7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2275ace-1474-48bf-a60e-5737da689555" xlink:to="loc_srt_CounterpartyNameAxis_ab78a38e-97c3-4f6e-8d28-7be6040ed1b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_ab78a38e-97c3-4f6e-8d28-7be6040ed1b7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_ab78a38e-97c3-4f6e-8d28-7be6040ed1b7" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_ab78a38e-97c3-4f6e-8d28-7be6040ed1b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_99abc189-5f82-4447-ac1d-f4ba41807150" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_ab78a38e-97c3-4f6e-8d28-7be6040ed1b7" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_99abc189-5f82-4447-ac1d-f4ba41807150" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AyarThirdInvestmentCompanyMember_cdb2e088-555a-444e-9910-b1cd408aa2c2" xlink:href="lcid-20251231.xsd#lcid_AyarThirdInvestmentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_99abc189-5f82-4447-ac1d-f4ba41807150" xlink:to="loc_lcid_AyarThirdInvestmentCompanyMember_cdb2e088-555a-444e-9910-b1cd408aa2c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_bfceb320-29ef-40cb-92eb-0c27a75d0068" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2275ace-1474-48bf-a60e-5737da689555" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_bfceb320-29ef-40cb-92eb-0c27a75d0068" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_bfceb320-29ef-40cb-92eb-0c27a75d0068_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_bfceb320-29ef-40cb-92eb-0c27a75d0068" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_bfceb320-29ef-40cb-92eb-0c27a75d0068_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_7960ad3d-3ca1-488d-8cb7-72b5de6db619" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_bfceb320-29ef-40cb-92eb-0c27a75d0068" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_7960ad3d-3ca1-488d-8cb7-72b5de6db619" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2023SubscriptionAgreementMember_3b92d1c9-12ed-42fa-8619-46627c069d5f" xlink:href="lcid-20251231.xsd#lcid_A2023SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_7960ad3d-3ca1-488d-8cb7-72b5de6db619" xlink:to="loc_lcid_A2023SubscriptionAgreementMember_3b92d1c9-12ed-42fa-8619-46627c069d5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_64c57033-56d3-4ba3-a9ce-d1b600f25c63" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_7960ad3d-3ca1-488d-8cb7-72b5de6db619" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_64c57033-56d3-4ba3-a9ce-d1b600f25c63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_1ff1e877-b116-4d94-a282-c62dd2f27ecd" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_7960ad3d-3ca1-488d-8cb7-72b5de6db619" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_1ff1e877-b116-4d94-a282-c62dd2f27ecd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_A2024SubscriptionAgreementMember_7fb00e61-2ee9-4a9b-b6dd-8e68e5d9d725" xlink:href="lcid-20251231.xsd#lcid_A2024SubscriptionAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_7960ad3d-3ca1-488d-8cb7-72b5de6db619" xlink:to="loc_lcid_A2024SubscriptionAgreementMember_7fb00e61-2ee9-4a9b-b6dd-8e68e5d9d725" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_69b6bf3c-e9fe-4207-bf3f-d3a1893a2951" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2275ace-1474-48bf-a60e-5737da689555" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_69b6bf3c-e9fe-4207-bf3f-d3a1893a2951" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_69b6bf3c-e9fe-4207-bf3f-d3a1893a2951_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_69b6bf3c-e9fe-4207-bf3f-d3a1893a2951" xlink:to="loc_us-gaap_RelatedPartyDomain_69b6bf3c-e9fe-4207-bf3f-d3a1893a2951_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_7dae534d-1c4a-4eb8-9262-1fc51b1406fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_69b6bf3c-e9fe-4207-bf3f-d3a1893a2951" xlink:to="loc_us-gaap_RelatedPartyDomain_7dae534d-1c4a-4eb8-9262-1fc51b1406fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_3b95f0a7-0d69-4e6a-a813-abacd16ba6f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_7dae534d-1c4a-4eb8-9262-1fc51b1406fe" xlink:to="loc_us-gaap_RelatedPartyMember_3b95f0a7-0d69-4e6a-a813-abacd16ba6f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_2afe5420-597b-4723-b8d3-ae261e237940" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2275ace-1474-48bf-a60e-5737da689555" xlink:to="loc_us-gaap_StatementClassOfStockAxis_2afe5420-597b-4723-b8d3-ae261e237940" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_2afe5420-597b-4723-b8d3-ae261e237940_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_2afe5420-597b-4723-b8d3-ae261e237940" xlink:to="loc_us-gaap_ClassOfStockDomain_2afe5420-597b-4723-b8d3-ae261e237940_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_8db085f8-141b-43d5-9e9f-928d49f5021e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_2afe5420-597b-4723-b8d3-ae261e237940" xlink:to="loc_us-gaap_ClassOfStockDomain_8db085f8-141b-43d5-9e9f-928d49f5021e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_f861aa69-672f-4d59-b48e-03c1377ecaf4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_8db085f8-141b-43d5-9e9f-928d49f5021e" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_f861aa69-672f-4d59-b48e-03c1377ecaf4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_5e99d190-a9a7-4f41-8e10-4adee81cbfb8" xlink:href="lcid-20251231.xsd#lcid_SeriesARedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_8db085f8-141b-43d5-9e9f-928d49f5021e" xlink:to="loc_lcid_SeriesARedeemableConvertiblePreferredStockMember_5e99d190-a9a7-4f41-8e10-4adee81cbfb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_762196d4-0d7b-4d2b-af8d-6326904bae25" xlink:href="lcid-20251231.xsd#lcid_SeriesBRedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_8db085f8-141b-43d5-9e9f-928d49f5021e" xlink:to="loc_lcid_SeriesBRedeemableConvertiblePreferredStockMember_762196d4-0d7b-4d2b-af8d-6326904bae25" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockConsiderationToReceiveOnTransaction_11124c9d-29eb-469b-b0ad-d3a1ce935d43" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockConsiderationToReceiveOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d354e7fe-999a-48b8-897c-f22df7f57938" xlink:to="loc_lcid_SaleOfStockConsiderationToReceiveOnTransaction_11124c9d-29eb-469b-b0ad-d3a1ce935d43" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_62c98611-9f4c-4fcb-89d2-5ed4128d2596" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d354e7fe-999a-48b8-897c-f22df7f57938" xlink:to="loc_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_62c98611-9f4c-4fcb-89d2-5ed4128d2596" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPricePerShare_e5985c1f-ac45-45c0-96a9-d82be7c13c7d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d354e7fe-999a-48b8-897c-f22df7f57938" xlink:to="loc_us-gaap_SaleOfStockPricePerShare_e5985c1f-ac45-45c0-96a9-d82be7c13c7d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_8c021363-d16e-41d9-a16c-6867df1223f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockConsiderationReceivedOnTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d354e7fe-999a-48b8-897c-f22df7f57938" xlink:to="loc_us-gaap_SaleOfStockConsiderationReceivedOnTransaction_8c021363-d16e-41d9-a16c-6867df1223f1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_25287855-a74f-4659-8117-3794fe9a550c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d354e7fe-999a-48b8-897c-f22df7f57938" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_25287855-a74f-4659-8117-3794fe9a550c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_StockIssuanceCosts_76234b14-3b32-4504-ae26-c6d06138d1e5" xlink:href="lcid-20251231.xsd#lcid_StockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d354e7fe-999a-48b8-897c-f22df7f57938" xlink:to="loc_lcid_StockIssuanceCosts_76234b14-3b32-4504-ae26-c6d06138d1e5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_SaleOfStockAdditionalNumberOfSharesIssuedInTransaction_236d11b9-b94e-4cd1-b36e-201278d455f0" xlink:href="lcid-20251231.xsd#lcid_SaleOfStockAdditionalNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d354e7fe-999a-48b8-897c-f22df7f57938" xlink:to="loc_lcid_SaleOfStockAdditionalNumberOfSharesIssuedInTransaction_236d11b9-b94e-4cd1-b36e-201278d455f0" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSHumanResourcesDevelopmentFundJointCooperationAgreementDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSHumanResourcesDevelopmentFundJointCooperationAgreementDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSHumanResourcesDevelopmentFundJointCooperationAgreementDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_d2888ede-39d3-49f4-bec8-fe6a26368695" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_7bb1772e-aa7a-4c5e-8a90-aed0789d039b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d2888ede-39d3-49f4-bec8-fe6a26368695" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_7bb1772e-aa7a-4c5e-8a90-aed0789d039b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_6b67ffab-eee2-4a44-b71c-ccc145e748e1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_7bb1772e-aa7a-4c5e-8a90-aed0789d039b" xlink:to="loc_srt_CounterpartyNameAxis_6b67ffab-eee2-4a44-b71c-ccc145e748e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_6b67ffab-eee2-4a44-b71c-ccc145e748e1_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_6b67ffab-eee2-4a44-b71c-ccc145e748e1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_6b67ffab-eee2-4a44-b71c-ccc145e748e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_049b8fa1-a2c6-4938-988b-e8a84b21b8f8" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_6b67ffab-eee2-4a44-b71c-ccc145e748e1" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_049b8fa1-a2c6-4938-988b-e8a84b21b8f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_HumanResourcesDevelopmentFundMember_2373c949-5a3e-4f5f-be4c-e7e249686b41" xlink:href="lcid-20251231.xsd#lcid_HumanResourcesDevelopmentFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_049b8fa1-a2c6-4938-988b-e8a84b21b8f8" xlink:to="loc_lcid_HumanResourcesDevelopmentFundMember_2373c949-5a3e-4f5f-be4c-e7e249686b41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_c708f211-2bf8-447a-9697-5f899bc9a3aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_7bb1772e-aa7a-4c5e-8a90-aed0789d039b" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_c708f211-2bf8-447a-9697-5f899bc9a3aa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_c708f211-2bf8-447a-9697-5f899bc9a3aa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_c708f211-2bf8-447a-9697-5f899bc9a3aa" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_c708f211-2bf8-447a-9697-5f899bc9a3aa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_18f9e061-8317-4782-8fe4-395f23f741b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_c708f211-2bf8-447a-9697-5f899bc9a3aa" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_18f9e061-8317-4782-8fe4-395f23f741b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_HumanResourcesDevelopmentFundTrainingReimbursementAgreementMember_9034882f-c471-47a1-801e-d5e925445c24" xlink:href="lcid-20251231.xsd#lcid_HumanResourcesDevelopmentFundTrainingReimbursementAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_18f9e061-8317-4782-8fe4-395f23f741b0" xlink:to="loc_lcid_HumanResourcesDevelopmentFundTrainingReimbursementAgreementMember_9034882f-c471-47a1-801e-d5e925445c24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3e1e4c2f-bad3-4d28-8247-730dc22f9a6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_7bb1772e-aa7a-4c5e-8a90-aed0789d039b" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3e1e4c2f-bad3-4d28-8247-730dc22f9a6b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_3e1e4c2f-bad3-4d28-8247-730dc22f9a6b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3e1e4c2f-bad3-4d28-8247-730dc22f9a6b" xlink:to="loc_us-gaap_RelatedPartyDomain_3e1e4c2f-bad3-4d28-8247-730dc22f9a6b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_b5fe08f0-0f95-478e-a4ed-9d5b12bb20e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_3e1e4c2f-bad3-4d28-8247-730dc22f9a6b" xlink:to="loc_us-gaap_RelatedPartyDomain_b5fe08f0-0f95-478e-a4ed-9d5b12bb20e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_5907b54a-737f-48bd-ac1c-4b7fa9d20f44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_b5fe08f0-0f95-478e-a4ed-9d5b12bb20e8" xlink:to="loc_us-gaap_RelatedPartyMember_5907b54a-737f-48bd-ac1c-4b7fa9d20f44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionMaximumReimbursementReceivable_43745b4c-0b48-49c3-b8dd-41f6419c8431" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionMaximumReimbursementReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d2888ede-39d3-49f4-bec8-fe6a26368695" xlink:to="loc_lcid_RelatedPartyTransactionMaximumReimbursementReceivable_43745b4c-0b48-49c3-b8dd-41f6419c8431" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ProceedsFromRelatedPartyReimbursement_58642413-dd21-494f-a9b6-96bee70aeae3" xlink:href="lcid-20251231.xsd#lcid_ProceedsFromRelatedPartyReimbursement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d2888ede-39d3-49f4-bec8-fe6a26368695" xlink:to="loc_lcid_ProceedsFromRelatedPartyReimbursement_58642413-dd21-494f-a9b6-96bee70aeae3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_8e1609f6-b39e-4fc2-8c77-21dea016ab1b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_d2888ede-39d3-49f4-bec8-fe6a26368695" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_8e1609f6-b39e-4fc2-8c77-21dea016ab1b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSEVPurchaseAgreementDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSEVPurchaseAgreementDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSEVPurchaseAgreementDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_a342ffac-8b09-4d35-aa63-4b673449e75d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6631ff81-bb5a-47d5-936e-21c4136f515b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_a342ffac-8b09-4d35-aa63-4b673449e75d" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6631ff81-bb5a-47d5-936e-21c4136f515b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_8bf6dfe1-0073-4e60-93a2-d263516b4bb0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6631ff81-bb5a-47d5-936e-21c4136f515b" xlink:to="loc_srt_ProductOrServiceAxis_8bf6dfe1-0073-4e60-93a2-d263516b4bb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8bf6dfe1-0073-4e60-93a2-d263516b4bb0_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_8bf6dfe1-0073-4e60-93a2-d263516b4bb0" xlink:to="loc_srt_ProductsAndServicesDomain_8bf6dfe1-0073-4e60-93a2-d263516b4bb0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5b4e88c6-d4da-4be0-853e-116c02877899" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_8bf6dfe1-0073-4e60-93a2-d263516b4bb0" xlink:to="loc_srt_ProductsAndServicesDomain_5b4e88c6-d4da-4be0-853e-116c02877899" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ElectricVehiclePurchaseAgreementMember_7ea79e9d-b03f-41dc-98ba-8b44635fb7d9" xlink:href="lcid-20251231.xsd#lcid_ElectricVehiclePurchaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5b4e88c6-d4da-4be0-853e-116c02877899" xlink:to="loc_lcid_ElectricVehiclePurchaseAgreementMember_7ea79e9d-b03f-41dc-98ba-8b44635fb7d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_19f64415-c8b4-4296-af18-6a06f14ae6f7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6631ff81-bb5a-47d5-936e-21c4136f515b" xlink:to="loc_srt_CounterpartyNameAxis_19f64415-c8b4-4296-af18-6a06f14ae6f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_19f64415-c8b4-4296-af18-6a06f14ae6f7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_19f64415-c8b4-4296-af18-6a06f14ae6f7" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_19f64415-c8b4-4296-af18-6a06f14ae6f7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_75ff3e61-ed29-4857-aa1b-c523528f7bdd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_19f64415-c8b4-4296-af18-6a06f14ae6f7" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_75ff3e61-ed29-4857-aa1b-c523528f7bdd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_GovernmentOfSaudiArabiaMember_fb48a7b6-8490-48d3-912d-7f6c6c6606b9" xlink:href="lcid-20251231.xsd#lcid_GovernmentOfSaudiArabiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_75ff3e61-ed29-4857-aa1b-c523528f7bdd" xlink:to="loc_lcid_GovernmentOfSaudiArabiaMember_fb48a7b6-8490-48d3-912d-7f6c6c6606b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_45fd8a01-8d5a-4465-b901-e8e052354ff0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6631ff81-bb5a-47d5-936e-21c4136f515b" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_45fd8a01-8d5a-4465-b901-e8e052354ff0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_45fd8a01-8d5a-4465-b901-e8e052354ff0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_45fd8a01-8d5a-4465-b901-e8e052354ff0" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_45fd8a01-8d5a-4465-b901-e8e052354ff0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_27e65528-249f-4605-9030-4bd2289a8e70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_45fd8a01-8d5a-4465-b901-e8e052354ff0" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_27e65528-249f-4605-9030-4bd2289a8e70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_EVPurchaseAgreementMember_d5ef3f88-5d9d-4967-aad5-a048e7a72e7d" xlink:href="lcid-20251231.xsd#lcid_EVPurchaseAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_27e65528-249f-4605-9030-4bd2289a8e70" xlink:to="loc_lcid_EVPurchaseAgreementMember_d5ef3f88-5d9d-4967-aad5-a048e7a72e7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_8cbf0f0b-cf0e-4a0f-86cd-12710286b1c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6631ff81-bb5a-47d5-936e-21c4136f515b" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_8cbf0f0b-cf0e-4a0f-86cd-12710286b1c3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_8cbf0f0b-cf0e-4a0f-86cd-12710286b1c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_8cbf0f0b-cf0e-4a0f-86cd-12710286b1c3" xlink:to="loc_us-gaap_RelatedPartyDomain_8cbf0f0b-cf0e-4a0f-86cd-12710286b1c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_45603f75-3b01-4282-acd4-517aacddd951" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_8cbf0f0b-cf0e-4a0f-86cd-12710286b1c3" xlink:to="loc_us-gaap_RelatedPartyDomain_45603f75-3b01-4282-acd4-517aacddd951" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_b7c6dda1-fbe6-435a-8339-0fbb3667b2f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_45603f75-3b01-4282-acd4-517aacddd951" xlink:to="loc_us-gaap_RelatedPartyMember_b7c6dda1-fbe6-435a-8339-0fbb3667b2f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LongTermSalesCommitmentNumberOfVehiclesCommitted_ce7955ba-ef52-4794-ba76-e2f4413679f9" xlink:href="lcid-20251231.xsd#lcid_LongTermSalesCommitmentNumberOfVehiclesCommitted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_a342ffac-8b09-4d35-aa63-4b673449e75d" xlink:to="loc_lcid_LongTermSalesCommitmentNumberOfVehiclesCommitted_ce7955ba-ef52-4794-ba76-e2f4413679f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LongTermSalesCommitmentNumberOfVehiclesCommittedMinimum_81eb7578-c3f7-4505-93e8-1c86cb41a513" xlink:href="lcid-20251231.xsd#lcid_LongTermSalesCommitmentNumberOfVehiclesCommittedMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_a342ffac-8b09-4d35-aa63-4b673449e75d" xlink:to="loc_lcid_LongTermSalesCommitmentNumberOfVehiclesCommittedMinimum_81eb7578-c3f7-4505-93e8-1c86cb41a513" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LongTermSalesCommitmentNumberOfVehiclesCommittedAdditional_a7d2cbc8-6cd2-44b3-b26d-6279e5c2a9f5" xlink:href="lcid-20251231.xsd#lcid_LongTermSalesCommitmentNumberOfVehiclesCommittedAdditional"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_a342ffac-8b09-4d35-aa63-4b673449e75d" xlink:to="loc_lcid_LongTermSalesCommitmentNumberOfVehiclesCommittedAdditional_a7d2cbc8-6cd2-44b3-b26d-6279e5c2a9f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LongTermSalesCommitmentNumberOfYears_9c1d22c1-c782-4aaf-8292-faacdac57f78" xlink:href="lcid-20251231.xsd#lcid_LongTermSalesCommitmentNumberOfYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_a342ffac-8b09-4d35-aa63-4b673449e75d" xlink:to="loc_lcid_LongTermSalesCommitmentNumberOfYears_9c1d22c1-c782-4aaf-8292-faacdac57f78" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LongTermSalesCommitmentMinimumVehiclePurchaseReductionPeriod_5fe80cca-a1c4-43b8-b4fb-d45edf1f69d3" xlink:href="lcid-20251231.xsd#lcid_LongTermSalesCommitmentMinimumVehiclePurchaseReductionPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_a342ffac-8b09-4d35-aa63-4b673449e75d" xlink:to="loc_lcid_LongTermSalesCommitmentMinimumVehiclePurchaseReductionPeriod_5fe80cca-a1c4-43b8-b4fb-d45edf1f69d3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d4ba172d-b251-473f-b042-2bb3e9a16dd0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_a342ffac-8b09-4d35-aa63-4b673449e75d" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d4ba172d-b251-473f-b042-2bb3e9a16dd0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_4e6c1588-b1cc-4cb4-a06d-cb21cbc06f06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_a342ffac-8b09-4d35-aa63-4b673449e75d" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_4e6c1588-b1cc-4cb4-a06d-cb21cbc06f06" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSImplementationAgreementwithAstonMartinDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSImplementationAgreementwithAstonMartinDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSImplementationAgreementwithAstonMartinDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_c5377613-d8b1-4f68-b5eb-ebddc5f12c3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_c5377613-d8b1-4f68-b5eb-ebddc5f12c3f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_2701cdca-da7e-4086-8d4f-ee950df0ca4b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_c5377613-d8b1-4f68-b5eb-ebddc5f12c3f" xlink:to="loc_srt_CounterpartyNameAxis_2701cdca-da7e-4086-8d4f-ee950df0ca4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_2701cdca-da7e-4086-8d4f-ee950df0ca4b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_2701cdca-da7e-4086-8d4f-ee950df0ca4b" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_2701cdca-da7e-4086-8d4f-ee950df0ca4b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_aacd4b1e-d2e8-4461-931c-57d13d5b2c65" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_2701cdca-da7e-4086-8d4f-ee950df0ca4b" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_aacd4b1e-d2e8-4461-931c-57d13d5b2c65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AstonMartinLagondaGlobalHoldingsPlcMember_7f7b20e7-6178-478e-870a-04d7f118ce73" xlink:href="lcid-20251231.xsd#lcid_AstonMartinLagondaGlobalHoldingsPlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_aacd4b1e-d2e8-4461-931c-57d13d5b2c65" xlink:to="loc_lcid_AstonMartinLagondaGlobalHoldingsPlcMember_7f7b20e7-6178-478e-870a-04d7f118ce73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_8a34f578-891a-4965-abde-915e8a9982b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_c5377613-d8b1-4f68-b5eb-ebddc5f12c3f" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_8a34f578-891a-4965-abde-915e8a9982b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_8a34f578-891a-4965-abde-915e8a9982b5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_8a34f578-891a-4965-abde-915e8a9982b5" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_8a34f578-891a-4965-abde-915e8a9982b5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_6d221e10-de86-4c46-9a9c-40be34dbdc4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_8a34f578-891a-4965-abde-915e8a9982b5" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_6d221e10-de86-4c46-9a9c-40be34dbdc4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_StrategicTechnologyArrangementMember_39b5cf5e-7664-44a0-b311-4b92ebf5ce6c" xlink:href="lcid-20251231.xsd#lcid_StrategicTechnologyArrangementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_6d221e10-de86-4c46-9a9c-40be34dbdc4b" xlink:to="loc_lcid_StrategicTechnologyArrangementMember_39b5cf5e-7664-44a0-b311-4b92ebf5ce6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_StrategicTechnologyArrangementTechnologyAccessFeesMember_3bc9bc43-e7f3-4710-aab9-a2e3d40d8f3d" xlink:href="lcid-20251231.xsd#lcid_StrategicTechnologyArrangementTechnologyAccessFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lcid_StrategicTechnologyArrangementMember_39b5cf5e-7664-44a0-b311-4b92ebf5ce6c" xlink:to="loc_lcid_StrategicTechnologyArrangementTechnologyAccessFeesMember_3bc9bc43-e7f3-4710-aab9-a2e3d40d8f3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_StrategicTechnologyArrangementServiceFeesMember_8321c4f4-23f8-439f-b7b0-d9476538f917" xlink:href="lcid-20251231.xsd#lcid_StrategicTechnologyArrangementServiceFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lcid_StrategicTechnologyArrangementMember_39b5cf5e-7664-44a0-b311-4b92ebf5ce6c" xlink:to="loc_lcid_StrategicTechnologyArrangementServiceFeesMember_8321c4f4-23f8-439f-b7b0-d9476538f917" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_StrategicTechnologyArrangementIntegrationServiceFeesMember_60003f9d-8666-44f8-8597-5981fc3b2701" xlink:href="lcid-20251231.xsd#lcid_StrategicTechnologyArrangementIntegrationServiceFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lcid_StrategicTechnologyArrangementMember_39b5cf5e-7664-44a0-b311-4b92ebf5ce6c" xlink:to="loc_lcid_StrategicTechnologyArrangementIntegrationServiceFeesMember_60003f9d-8666-44f8-8597-5981fc3b2701" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_351c9137-84ed-4289-b273-87ed35af6b34" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_c5377613-d8b1-4f68-b5eb-ebddc5f12c3f" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_351c9137-84ed-4289-b273-87ed35af6b34" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_351c9137-84ed-4289-b273-87ed35af6b34_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_351c9137-84ed-4289-b273-87ed35af6b34" xlink:to="loc_us-gaap_RelatedPartyDomain_351c9137-84ed-4289-b273-87ed35af6b34_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_a0e02eb9-2bf3-48fb-9cca-1cb79e625683" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_351c9137-84ed-4289-b273-87ed35af6b34" xlink:to="loc_us-gaap_RelatedPartyDomain_a0e02eb9-2bf3-48fb-9cca-1cb79e625683" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_ecb180ad-020f-461e-bc46-b068e4c42437" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_a0e02eb9-2bf3-48fb-9cca-1cb79e625683" xlink:to="loc_us-gaap_RelatedPartyMember_ecb180ad-020f-461e-bc46-b068e4c42437" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_237f9c6c-f69e-4d63-93ff-285332566977" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_c5377613-d8b1-4f68-b5eb-ebddc5f12c3f" xlink:to="loc_dei_LegalEntityAxis_237f9c6c-f69e-4d63-93ff-285332566977" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_237f9c6c-f69e-4d63-93ff-285332566977_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_237f9c6c-f69e-4d63-93ff-285332566977" xlink:to="loc_dei_EntityDomain_237f9c6c-f69e-4d63-93ff-285332566977_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3d6da080-debd-4eaa-97b9-adeac26d3e3c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_237f9c6c-f69e-4d63-93ff-285332566977" xlink:to="loc_dei_EntityDomain_3d6da080-debd-4eaa-97b9-adeac26d3e3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AstonMartinLagondaGlobalHoldingsPlcMember_fda3593c-0c51-4dae-9192-19847031d9e5" xlink:href="lcid-20251231.xsd#lcid_AstonMartinLagondaGlobalHoldingsPlcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3d6da080-debd-4eaa-97b9-adeac26d3e3c" xlink:to="loc_lcid_AstonMartinLagondaGlobalHoldingsPlcMember_fda3593c-0c51-4dae-9192-19847031d9e5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionNumberOfSharesReceived_266a40f3-5c0b-427b-9e6d-42b9d21f55ba" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionNumberOfSharesReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_lcid_RelatedPartyTransactionNumberOfSharesReceived_266a40f3-5c0b-427b-9e6d-42b9d21f55ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionInitialInstallment_49aad7fa-74a1-444a-a9da-6299bc56461e" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionInitialInstallment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_lcid_RelatedPartyTransactionInitialInstallment_49aad7fa-74a1-444a-a9da-6299bc56461e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionFairValueAmount_2982c048-8c5c-4b82-99e8-a7afeb43c3b7" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionFairValueAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_lcid_RelatedPartyTransactionFairValueAmount_2982c048-8c5c-4b82-99e8-a7afeb43c3b7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionRemainingAmount_58793ccb-9472-4c7a-af22-bbea8db6d705" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionRemainingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_lcid_RelatedPartyTransactionRemainingAmount_58793ccb-9472-4c7a-af22-bbea8db6d705" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_RelatedPartyTransactionPaymentTerm_154f930e-f23c-49a6-8128-338c3524696e" xlink:href="lcid-20251231.xsd#lcid_RelatedPartyTransactionPaymentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_lcid_RelatedPartyTransactionPaymentTerm_154f930e-f23c-49a6-8128-338c3524696e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PurchaseCommitmentMinimumAmountCommitted_d487a6e2-b479-4f66-8194-9b9a5561da1a" xlink:href="lcid-20251231.xsd#lcid_PurchaseCommitmentMinimumAmountCommitted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_lcid_PurchaseCommitmentMinimumAmountCommitted_d487a6e2-b479-4f66-8194-9b9a5561da1a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_ab59b195-359b-4008-bbc2-8b4c0a1a1e74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_us-gaap_AccountsReceivableNet_ab59b195-359b-4008-bbc2-8b4c0a1a1e74" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_StrategicTechnologyArrangementPaymentTerm_abcf6347-82b6-4b66-a616-46a024ccdb7d" xlink:href="lcid-20251231.xsd#lcid_StrategicTechnologyArrangementPaymentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_lcid_StrategicTechnologyArrangementPaymentTerm_abcf6347-82b6-4b66-a616-46a024ccdb7d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_612e1f37-ef96-46a9-9294-789dcd04b5a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_us-gaap_RelatedPartyTransactionAmountsOfTransaction_612e1f37-ef96-46a9-9294-789dcd04b5a3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_373e7b26-256e-4a12-9402-b649b84ea35f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_373e7b26-256e-4a12-9402-b649b84ea35f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_f4a62e95-95d7-458e-8e63-1114f0764be3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_520b73a8-4866-43a1-aca7-22d85994c435" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_f4a62e95-95d7-458e-8e63-1114f0764be3" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSDDTLCreditFacilityDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSDDTLCreditFacilityDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSDDTLCreditFacilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_1fb9b4db-1c4a-40df-a70c-951726be6458" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3cd79759-8eed-4af1-8911-93ff7518d76e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_1fb9b4db-1c4a-40df-a70c-951726be6458" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3cd79759-8eed-4af1-8911-93ff7518d76e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_dc3fdd87-562c-4eb9-b157-0e152c9359db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3cd79759-8eed-4af1-8911-93ff7518d76e" xlink:to="loc_us-gaap_CreditFacilityAxis_dc3fdd87-562c-4eb9-b157-0e152c9359db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_dc3fdd87-562c-4eb9-b157-0e152c9359db_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_dc3fdd87-562c-4eb9-b157-0e152c9359db" xlink:to="loc_us-gaap_CreditFacilityDomain_dc3fdd87-562c-4eb9-b157-0e152c9359db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_46110460-020f-439e-9a38-df163284c4a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_dc3fdd87-562c-4eb9-b157-0e152c9359db" xlink:to="loc_us-gaap_CreditFacilityDomain_46110460-020f-439e-9a38-df163284c4a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_0a75a4bd-089f-49b0-9c89-86133deb6819" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_46110460-020f-439e-9a38-df163284c4a1" xlink:to="loc_us-gaap_SecuredDebtMember_0a75a4bd-089f-49b0-9c89-86133deb6819" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_d8268c86-71c9-4d16-9482-fd2c56a72fec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3cd79759-8eed-4af1-8911-93ff7518d76e" xlink:to="loc_us-gaap_DebtInstrumentAxis_d8268c86-71c9-4d16-9482-fd2c56a72fec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_d8268c86-71c9-4d16-9482-fd2c56a72fec_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_d8268c86-71c9-4d16-9482-fd2c56a72fec" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_d8268c86-71c9-4d16-9482-fd2c56a72fec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_17c11bea-ed88-4c0e-9727-a8f3239655bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_d8268c86-71c9-4d16-9482-fd2c56a72fec" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_17c11bea-ed88-4c0e-9727-a8f3239655bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_DDTLCreditFacilityMember_4c6c72a7-117f-44a2-a3e5-efb47c705b46" xlink:href="lcid-20251231.xsd#lcid_DDTLCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_17c11bea-ed88-4c0e-9727-a8f3239655bc" xlink:to="loc_lcid_DDTLCreditFacilityMember_4c6c72a7-117f-44a2-a3e5-efb47c705b46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_0979f635-03d1-4070-a633-70533a6d9693" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3cd79759-8eed-4af1-8911-93ff7518d76e" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_0979f635-03d1-4070-a633-70533a6d9693" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_0979f635-03d1-4070-a633-70533a6d9693_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_0979f635-03d1-4070-a633-70533a6d9693" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_0979f635-03d1-4070-a633-70533a6d9693_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_af5ab699-7255-403a-bd5a-dfa9d1a94054" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_0979f635-03d1-4070-a633-70533a6d9693" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_af5ab699-7255-403a-bd5a-dfa9d1a94054" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DelayedDrawTermLoanMember_816d6161-24e4-4418-87f5-58b5d9228940" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DelayedDrawTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_af5ab699-7255-403a-bd5a-dfa9d1a94054" xlink:to="loc_us-gaap_DelayedDrawTermLoanMember_816d6161-24e4-4418-87f5-58b5d9228940" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019b0cf7-f9d1-7dc0-964a-5a5ed51ec7d2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_3cd79759-8eed-4af1-8911-93ff7518d76e" xlink:to="loc_srt_RangeAxis_019b0cf7-f9d1-7dc0-964a-5a5ed51ec7d2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019b0cf7-f9d1-7dc0-964a-5a5ed51ec7d2_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019b0cf7-f9d1-7dc0-964a-5a5ed51ec7d2" xlink:to="loc_srt_RangeMember_019b0cf7-f9d1-7dc0-964a-5a5ed51ec7d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019b0cf7-f9d1-73f7-989f-3720f7334f04" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019b0cf7-f9d1-7dc0-964a-5a5ed51ec7d2" xlink:to="loc_srt_RangeMember_019b0cf7-f9d1-73f7-989f-3720f7334f04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019b0cf8-5253-7e59-aaec-f9aea683a39f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019b0cf7-f9d1-73f7-989f-3720f7334f04" xlink:to="loc_srt_MinimumMember_019b0cf8-5253-7e59-aaec-f9aea683a39f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019b0cf8-9bdd-7b8d-a12c-736ccf9af3d1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019b0cf7-f9d1-73f7-989f-3720f7334f04" xlink:to="loc_srt_MaximumMember_019b0cf8-9bdd-7b8d-a12c-736ccf9af3d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_63a0b987-57c6-41a2-9f78-2cb8cbacb700" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_1fb9b4db-1c4a-40df-a70c-951726be6458" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_63a0b987-57c6-41a2-9f78-2cb8cbacb700" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_cfb330a6-9d1d-45d2-86b3-0ff4041ec0c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_1fb9b4db-1c4a-40df-a70c-951726be6458" xlink:to="loc_us-gaap_DebtInstrumentTerm_cfb330a6-9d1d-45d2-86b3-0ff4041ec0c4" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSTimeDepositDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSTimeDepositDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSTimeDepositDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_28a4686f-6ab8-4528-8237-b052640ae993" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01cf4729-4068-4e0c-8f81-d1a3de3e44fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_28a4686f-6ab8-4528-8237-b052640ae993" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01cf4729-4068-4e0c-8f81-d1a3de3e44fd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_6596912f-bf80-4fcb-9aca-2a7745472d8d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01cf4729-4068-4e0c-8f81-d1a3de3e44fd" xlink:to="loc_srt_CounterpartyNameAxis_6596912f-bf80-4fcb-9aca-2a7745472d8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_6596912f-bf80-4fcb-9aca-2a7745472d8d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_6596912f-bf80-4fcb-9aca-2a7745472d8d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_6596912f-bf80-4fcb-9aca-2a7745472d8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_14aeeeac-8cbc-43a3-97de-1fbc23387c99" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_6596912f-bf80-4fcb-9aca-2a7745472d8d" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_14aeeeac-8cbc-43a3-97de-1fbc23387c99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_GIBMember_8c8131d6-c071-4063-86d9-13fbb0aa0942" xlink:href="lcid-20251231.xsd#lcid_GIBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_14aeeeac-8cbc-43a3-97de-1fbc23387c99" xlink:to="loc_lcid_GIBMember_8c8131d6-c071-4063-86d9-13fbb0aa0942" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_505d31eb-4d56-4aad-8a20-e1364bbf6b52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01cf4729-4068-4e0c-8f81-d1a3de3e44fd" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_505d31eb-4d56-4aad-8a20-e1364bbf6b52" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_505d31eb-4d56-4aad-8a20-e1364bbf6b52_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_505d31eb-4d56-4aad-8a20-e1364bbf6b52" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_505d31eb-4d56-4aad-8a20-e1364bbf6b52_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_87888306-bc4d-43c0-9f0a-e991a137ba9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_505d31eb-4d56-4aad-8a20-e1364bbf6b52" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_87888306-bc4d-43c0-9f0a-e991a137ba9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_001bc8f9-fc91-49fc-b9bc-3e5c5344f9f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_87888306-bc4d-43c0-9f0a-e991a137ba9c" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_001bc8f9-fc91-49fc-b9bc-3e5c5344f9f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_4e4538ed-f7b6-4e34-911a-37dc9ca146dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01cf4729-4068-4e0c-8f81-d1a3de3e44fd" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_4e4538ed-f7b6-4e34-911a-37dc9ca146dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_4e4538ed-f7b6-4e34-911a-37dc9ca146dc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_4e4538ed-f7b6-4e34-911a-37dc9ca146dc" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_4e4538ed-f7b6-4e34-911a-37dc9ca146dc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_d053610d-1f0c-4b24-b65a-d0bee7baa14d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_4e4538ed-f7b6-4e34-911a-37dc9ca146dc" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_d053610d-1f0c-4b24-b65a-d0bee7baa14d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_dec811e3-f9a4-4164-a10b-dfdc236a3628" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_d053610d-1f0c-4b24-b65a-d0bee7baa14d" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_dec811e3-f9a4-4164-a10b-dfdc236a3628" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_9b569caa-5312-4efd-b627-68bd6d251788" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01cf4729-4068-4e0c-8f81-d1a3de3e44fd" xlink:to="loc_us-gaap_FinancialInstrumentAxis_9b569caa-5312-4efd-b627-68bd6d251788" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_9b569caa-5312-4efd-b627-68bd6d251788_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_9b569caa-5312-4efd-b627-68bd6d251788" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_9b569caa-5312-4efd-b627-68bd6d251788_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5afd39a-c482-4e9e-b957-b0a690e3543b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_9b569caa-5312-4efd-b627-68bd6d251788" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5afd39a-c482-4e9e-b957-b0a690e3543b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankTimeDepositsMember_f4997d30-4681-45c7-81e7-8ec04dc94c46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BankTimeDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_e5afd39a-c482-4e9e-b957-b0a690e3543b" xlink:to="loc_us-gaap_BankTimeDepositsMember_f4997d30-4681-45c7-81e7-8ec04dc94c46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_714c09ff-4221-4105-bd93-2c535b23507f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_01cf4729-4068-4e0c-8f81-d1a3de3e44fd" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_714c09ff-4221-4105-bd93-2c535b23507f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_714c09ff-4221-4105-bd93-2c535b23507f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_714c09ff-4221-4105-bd93-2c535b23507f" xlink:to="loc_us-gaap_RelatedPartyDomain_714c09ff-4221-4105-bd93-2c535b23507f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_cd07c3ad-7372-43ac-ac3f-8a8cad008f0a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_714c09ff-4221-4105-bd93-2c535b23507f" xlink:to="loc_us-gaap_RelatedPartyDomain_cd07c3ad-7372-43ac-ac3f-8a8cad008f0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_43927535-4e78-41dd-94e2-f73a040d5fee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_cd07c3ad-7372-43ac-ac3f-8a8cad008f0a" xlink:to="loc_us-gaap_RelatedPartyMember_43927535-4e78-41dd-94e2-f73a040d5fee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_4a6ceb44-9c91-49ea-a3d1-dd7963dd98db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_28a4686f-6ab8-4528-8237-b052640ae993" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_4a6ceb44-9c91-49ea-a3d1-dd7963dd98db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_ec6697b0-7d35-4678-a157-fe746df2e24e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_28a4686f-6ab8-4528-8237-b052640ae993" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesNoncurrent_ec6697b0-7d35-4678-a157-fe746df2e24e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSAyarPrepaidForwardTransactionsDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#RELATEDPARTYTRANSACTIONSAyarPrepaidForwardTransactionsDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/RELATEDPARTYTRANSACTIONSAyarPrepaidForwardTransactionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019b0c6f-9f5b-76db-b0c6-4d5781591660" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019b0c6f-9f5b-72f0-a940-35d04c9ce0da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019b0c6f-9f5b-76db-b0c6-4d5781591660" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019b0c6f-9f5b-72f0-a940-35d04c9ce0da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019b0c6f-9f5b-775a-85f4-475276c4a993" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019b0c6f-9f5b-72f0-a940-35d04c9ce0da" xlink:to="loc_srt_CounterpartyNameAxis_019b0c6f-9f5b-775a-85f4-475276c4a993" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0c6f-9f5b-775a-85f4-475276c4a993_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019b0c6f-9f5b-775a-85f4-475276c4a993" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0c6f-9f5b-775a-85f4-475276c4a993_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0c6f-9f5b-759d-9546-87392fd379b1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019b0c6f-9f5b-775a-85f4-475276c4a993" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0c6f-9f5b-759d-9546-87392fd379b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ForwardCounterpartyMember_019b0c6f-9f5b-7499-91b5-ff1f206b7f82" xlink:href="lcid-20251231.xsd#lcid_ForwardCounterpartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019b0c6f-9f5b-759d-9546-87392fd379b1" xlink:to="loc_lcid_ForwardCounterpartyMember_019b0c6f-9f5b-7499-91b5-ff1f206b7f82" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019b0c6f-9f5b-73f8-b30c-89d5cedaf5a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019b0c6f-9f5b-72f0-a940-35d04c9ce0da" xlink:to="loc_us-gaap_DebtInstrumentAxis_019b0c6f-9f5b-73f8-b30c-89d5cedaf5a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b0c6f-9f5b-73f8-b30c-89d5cedaf5a4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b0c6f-9f5b-73f8-b30c-89d5cedaf5a4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b0c6f-9f5b-73f8-b30c-89d5cedaf5a4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019b0c6f-9f5b-75ee-bab5-afa550de2263" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019b0c6f-9f5b-73f8-b30c-89d5cedaf5a4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019b0c6f-9f5b-75ee-bab5-afa550de2263" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ConvertibleSeniorNotesDue2030Member_019b0c6f-9f5b-75db-8458-5d0bd0576b1d" xlink:href="lcid-20251231.xsd#lcid_ConvertibleSeniorNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b0c6f-9f5b-75ee-bab5-afa550de2263" xlink:to="loc_lcid_ConvertibleSeniorNotesDue2030Member_019b0c6f-9f5b-75db-8458-5d0bd0576b1d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ConvertibleSeniorNotesDue2031Member_019b0c6f-9f5b-7b21-9f75-6a9aa1d17917" xlink:href="lcid-20251231.xsd#lcid_ConvertibleSeniorNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019b0c6f-9f5b-75ee-bab5-afa550de2263" xlink:to="loc_lcid_ConvertibleSeniorNotesDue2031Member_019b0c6f-9f5b-7b21-9f75-6a9aa1d17917" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019b0c6f-9f5b-7563-93da-d7751ec2676a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019b0c6f-9f5b-72f0-a940-35d04c9ce0da" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019b0c6f-9f5b-7563-93da-d7751ec2676a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b0c6f-9f5b-7563-93da-d7751ec2676a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b0c6f-9f5b-7563-93da-d7751ec2676a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b0c6f-9f5b-7563-93da-d7751ec2676a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019b0c6f-9f5b-7919-bf53-55d376e18bff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019b0c6f-9f5b-7563-93da-d7751ec2676a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019b0c6f-9f5b-7919-bf53-55d376e18bff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019b0c6f-9f5b-729b-8fd8-4251f1fe7415" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019b0c6f-9f5b-7919-bf53-55d376e18bff" xlink:to="loc_us-gaap_ConvertibleDebtMember_019b0c6f-9f5b-729b-8fd8-4251f1fe7415" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019b0c6f-9f5b-73e3-ba82-3e8f8277257f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019b0c6f-9f5b-72f0-a940-35d04c9ce0da" xlink:to="loc_dei_LegalEntityAxis_019b0c6f-9f5b-73e3-ba82-3e8f8277257f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019b0c6f-9f5b-73e3-ba82-3e8f8277257f_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019b0c6f-9f5b-73e3-ba82-3e8f8277257f" xlink:to="loc_dei_EntityDomain_019b0c6f-9f5b-73e3-ba82-3e8f8277257f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019b0c6f-9f5b-79aa-a21e-c62653d506ed" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019b0c6f-9f5b-73e3-ba82-3e8f8277257f" xlink:to="loc_dei_EntityDomain_019b0c6f-9f5b-79aa-a21e-c62653d506ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_AyarThirdInvestmentCompanyMember_019b0c6f-9f5b-7696-a668-1166ccb7afd2" xlink:href="lcid-20251231.xsd#lcid_AyarThirdInvestmentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019b0c6f-9f5b-79aa-a21e-c62653d506ed" xlink:to="loc_lcid_AyarThirdInvestmentCompanyMember_019b0c6f-9f5b-7696-a668-1166ccb7afd2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b0c70-523d-7cc5-83fb-7725a3ee15ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019b0c6f-9f5b-72f0-a940-35d04c9ce0da" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b0c70-523d-7cc5-83fb-7725a3ee15ae" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019b0c70-523d-7cc5-83fb-7725a3ee15ae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b0c70-523d-7cc5-83fb-7725a3ee15ae" xlink:to="loc_us-gaap_RelatedPartyDomain_019b0c70-523d-7cc5-83fb-7725a3ee15ae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019b0c70-523d-7d7d-a99c-d4a5a8a885e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019b0c70-523d-7cc5-83fb-7725a3ee15ae" xlink:to="loc_us-gaap_RelatedPartyDomain_019b0c70-523d-7d7d-a99c-d4a5a8a885e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019b0c70-523d-7d11-abe3-0754b6bcb257" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019b0c70-523d-7d7d-a99c-d4a5a8a885e0" xlink:to="loc_us-gaap_RelatedPartyMember_019b0c70-523d-7d11-abe3-0754b6bcb257" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019b0c90-fae4-776d-bc50-76b438071dce" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019b0c6f-9f5b-72f0-a940-35d04c9ce0da" xlink:to="loc_srt_StatementScenarioAxis_019b0c90-fae4-776d-bc50-76b438071dce" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019b0c90-fae4-776d-bc50-76b438071dce_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019b0c90-fae4-776d-bc50-76b438071dce" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019b0c90-fae4-776d-bc50-76b438071dce_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019b0c90-fae4-75bd-b7fd-397c43d1f60d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019b0c90-fae4-776d-bc50-76b438071dce" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019b0c90-fae4-75bd-b7fd-397c43d1f60d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_019b0c90-fae4-7a3a-98fe-0503866f55b3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019b0c90-fae4-75bd-b7fd-397c43d1f60d" xlink:to="loc_srt_ScenarioForecastMember_019b0c90-fae4-7a3a-98fe-0503866f55b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_PrepaidForwardTransaction_019b0c6f-9f5b-73fb-b819-8b79f6b69fad" xlink:href="lcid-20251231.xsd#lcid_PrepaidForwardTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019b0c6f-9f5b-76db-b0c6-4d5781591660" xlink:to="loc_lcid_PrepaidForwardTransaction_019b0c6f-9f5b-73fb-b819-8b79f6b69fad" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/SEGMENTREPORTINGScheduleofRevenueByGeographicAreaBasedOnSalesLocationDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#SEGMENTREPORTINGScheduleofRevenueByGeographicAreaBasedOnSalesLocationDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/SEGMENTREPORTINGScheduleofRevenueByGeographicAreaBasedOnSalesLocationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_a1b0eb14-f475-4c55-9111-dc03a1fa1ca8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_c4fb3b1e-7d40-4c77-888c-e6c9a84f9e52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_a1b0eb14-f475-4c55-9111-dc03a1fa1ca8" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_c4fb3b1e-7d40-4c77-888c-e6c9a84f9e52" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_89e14273-96d3-4e0b-a0a3-ae7c2b486105" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_c4fb3b1e-7d40-4c77-888c-e6c9a84f9e52" xlink:to="loc_srt_StatementGeographicalAxis_89e14273-96d3-4e0b-a0a3-ae7c2b486105" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_89e14273-96d3-4e0b-a0a3-ae7c2b486105_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_89e14273-96d3-4e0b-a0a3-ae7c2b486105" xlink:to="loc_srt_SegmentGeographicalDomain_89e14273-96d3-4e0b-a0a3-ae7c2b486105_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_1ce8e647-eb22-4cec-93e5-79f9808e055c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_89e14273-96d3-4e0b-a0a3-ae7c2b486105" xlink:to="loc_srt_SegmentGeographicalDomain_1ce8e647-eb22-4cec-93e5-79f9808e055c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NorthAmericaMember_04267d8d-2e90-4666-a5b0-75b328bb047e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NorthAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1ce8e647-eb22-4cec-93e5-79f9808e055c" xlink:to="loc_srt_NorthAmericaMember_04267d8d-2e90-4666-a5b0-75b328bb047e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MiddleEastMember_0d669b5e-bdfb-422c-a228-698ff461ac05" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MiddleEastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1ce8e647-eb22-4cec-93e5-79f9808e055c" xlink:to="loc_us-gaap_MiddleEastMember_0d669b5e-bdfb-422c-a228-698ff461ac05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_OtherInternationalMember_445db9f8-6bfd-4223-8d6d-4cbdbeb133c0" xlink:href="lcid-20251231.xsd#lcid_OtherInternationalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1ce8e647-eb22-4cec-93e5-79f9808e055c" xlink:to="loc_lcid_OtherInternationalMember_445db9f8-6bfd-4223-8d6d-4cbdbeb133c0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_39751517-4595-4463-af64-7fa81db525ae" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1ce8e647-eb22-4cec-93e5-79f9808e055c" xlink:to="loc_country_US_39751517-4595-4463-af64-7fa81db525ae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_SA_64e5736a-3802-4bb8-bc97-5fd7e07617ec" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_SA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1ce8e647-eb22-4cec-93e5-79f9808e055c" xlink:to="loc_country_SA_64e5736a-3802-4bb8-bc97-5fd7e07617ec" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_c1d54d77-c97a-4674-90c9-330430df009f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_a1b0eb14-f475-4c55-9111-dc03a1fa1ca8" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_c1d54d77-c97a-4674-90c9-330430df009f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/SEGMENTREPORTINGScheduleofSegmentRevenueSegmentProfitorLossandSignificantSegmentExpensesDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#SEGMENTREPORTINGScheduleofSegmentRevenueSegmentProfitorLossandSignificantSegmentExpensesDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/SEGMENTREPORTINGScheduleofSegmentRevenueSegmentProfitorLossandSignificantSegmentExpensesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_1ac7fcfc-ed10-43a3-911c-76cbe0e59859" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_1ac7fcfc-ed10-43a3-911c-76cbe0e59859" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_8be0ea0f-30db-4fed-aa4c-2ab13d4b46fd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_1ac7fcfc-ed10-43a3-911c-76cbe0e59859" xlink:to="loc_srt_ProductOrServiceAxis_8be0ea0f-30db-4fed-aa4c-2ab13d4b46fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8be0ea0f-30db-4fed-aa4c-2ab13d4b46fd_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_8be0ea0f-30db-4fed-aa4c-2ab13d4b46fd" xlink:to="loc_srt_ProductsAndServicesDomain_8be0ea0f-30db-4fed-aa4c-2ab13d4b46fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8c3115da-2595-4382-bbdc-9699d6eb6212" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_8be0ea0f-30db-4fed-aa4c-2ab13d4b46fd" xlink:to="loc_srt_ProductsAndServicesDomain_8c3115da-2595-4382-bbdc-9699d6eb6212" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_CostOfGoodsSoldExcludingLCNRVAndWarrantyProvisionMember_aa6d321f-37e9-49e0-ab18-2bdc43a895aa" xlink:href="lcid-20251231.xsd#lcid_CostOfGoodsSoldExcludingLCNRVAndWarrantyProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8c3115da-2595-4382-bbdc-9699d6eb6212" xlink:to="loc_lcid_CostOfGoodsSoldExcludingLCNRVAndWarrantyProvisionMember_aa6d321f-37e9-49e0-ab18-2bdc43a895aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_LCNRVMember_d90cc7f6-23cd-4724-b32b-df568bd5efd1" xlink:href="lcid-20251231.xsd#lcid_LCNRVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8c3115da-2595-4382-bbdc-9699d6eb6212" xlink:to="loc_lcid_LCNRVMember_d90cc7f6-23cd-4724-b32b-df568bd5efd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_WarrantyProvisionMember_69f3f916-6dfc-4514-bfae-f0ab1e4e3e32" xlink:href="lcid-20251231.xsd#lcid_WarrantyProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_8c3115da-2595-4382-bbdc-9699d6eb6212" xlink:to="loc_lcid_WarrantyProvisionMember_69f3f916-6dfc-4514-bfae-f0ab1e4e3e32" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_c4c4f3c9-1226-4baa-bdc1-0c23626b0352" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_1ac7fcfc-ed10-43a3-911c-76cbe0e59859" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_c4c4f3c9-1226-4baa-bdc1-0c23626b0352" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c4c4f3c9-1226-4baa-bdc1-0c23626b0352_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_c4c4f3c9-1226-4baa-bdc1-0c23626b0352" xlink:to="loc_us-gaap_SegmentDomain_c4c4f3c9-1226-4baa-bdc1-0c23626b0352_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_6804d497-c692-4c0c-a14a-306dc34b3dde" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_c4c4f3c9-1226-4baa-bdc1-0c23626b0352" xlink:to="loc_us-gaap_SegmentDomain_6804d497-c692-4c0c-a14a-306dc34b3dde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lcid_ReportableSegmentMember_28b57355-5ecf-4e20-a2bf-70d0f3b6dfd6" xlink:href="lcid-20251231.xsd#lcid_ReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_6804d497-c692-4c0c-a14a-306dc34b3dde" xlink:to="loc_lcid_ReportableSegmentMember_28b57355-5ecf-4e20-a2bf-70d0f3b6dfd6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d5820f92-2d3a-4b74-80b7-467282008fd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d5820f92-2d3a-4b74-80b7-467282008fd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_e2fcefa4-5108-4125-81f3-19c17d9a9c2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_CostOfRevenue_e2fcefa4-5108-4125-81f3-19c17d9a9c2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_521fbaaf-7ee0-4fba-8480-796d971b0f7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_521fbaaf-7ee0-4fba-8480-796d971b0f7f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_27a741d5-aec8-4467-9b05-7bceb1e90e00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_27a741d5-aec8-4467-9b05-7bceb1e90e00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_0059e880-cf76-4559-abbe-ef3445c8eb33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_RestructuringCharges_0059e880-cf76-4559-abbe-ef3445c8eb33" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAdjustmentOfWarrants_027afb0e-a2fd-43a8-9c32-db320dbd7e5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAdjustmentOfWarrants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_FairValueAdjustmentOfWarrants_027afb0e-a2fd-43a8-9c32-db320dbd7e5a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_05f3db2b-d5eb-4f3f-a5e8-5b11f6c7cd67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_05f3db2b-d5eb-4f3f-a5e8-5b11f6c7cd67" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives_d315d6fa-3ebd-4624-9fe7-c286c26db4cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_UnrealizedGainLossOnDerivatives_d315d6fa-3ebd-4624-9fe7-c286c26db4cb" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019b0c65-2545-7dd6-a480-d3e2653c4d04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019b0c65-2545-7dd6-a480-d3e2653c4d04" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_bd5a42cb-8724-4e2f-b582-8e297ed76aae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_InvestmentIncomeInterest_bd5a42cb-8724-4e2f-b582-8e297ed76aae" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_11d7ce19-b182-4f4b-bb86-b1aaa1f2351e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_InterestExpenseNonoperating_11d7ce19-b182-4f4b-bb86-b1aaa1f2351e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_27721709-b831-4709-8a38-653480afd840" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_27721709-b831-4709-8a38-653480afd840" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_b21be183-27fc-43a8-acba-a4bd89eef008" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_b21be183-27fc-43a8-acba-a4bd89eef008" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_2197c793-c4a3-4405-9f4d-3e7b8b5157c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_44f13b78-7a14-4e23-98e5-17399bc912c7" xlink:to="loc_us-gaap_NetIncomeLoss_2197c793-c4a3-4405-9f4d-3e7b8b5157c3" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/SEGMENTREPORTINGScheduleofLongLivedAssetsbyGeographicAreasDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#SEGMENTREPORTINGScheduleofLongLivedAssetsbyGeographicAreasDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/SEGMENTREPORTINGScheduleofLongLivedAssetsbyGeographicAreasDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_1cd3c80d-3eb5-4e36-9b23-b1bc10ab6dd8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_d9d487a9-8e37-42d7-bbf3-007617dcf235" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_1cd3c80d-3eb5-4e36-9b23-b1bc10ab6dd8" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_d9d487a9-8e37-42d7-bbf3-007617dcf235" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_55cbf93d-3234-4a13-ba56-e2527ee0261a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_d9d487a9-8e37-42d7-bbf3-007617dcf235" xlink:to="loc_srt_StatementGeographicalAxis_55cbf93d-3234-4a13-ba56-e2527ee0261a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_55cbf93d-3234-4a13-ba56-e2527ee0261a_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_55cbf93d-3234-4a13-ba56-e2527ee0261a" xlink:to="loc_srt_SegmentGeographicalDomain_55cbf93d-3234-4a13-ba56-e2527ee0261a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_d73a10ce-ccd9-4933-a6cc-b7ac18e1d4a4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_55cbf93d-3234-4a13-ba56-e2527ee0261a" xlink:to="loc_srt_SegmentGeographicalDomain_d73a10ce-ccd9-4933-a6cc-b7ac18e1d4a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_8a8ba4ce-36a6-4336-9070-d9d4efb3abbc" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_d73a10ce-ccd9-4933-a6cc-b7ac18e1d4a4" xlink:to="loc_country_US_8a8ba4ce-36a6-4336-9070-d9d4efb3abbc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_c3d49c9e-e160-43a2-9ddf-a42d9ff323d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_d73a10ce-ccd9-4933-a6cc-b7ac18e1d4a4" xlink:to="loc_us-gaap_NonUsMember_c3d49c9e-e160-43a2-9ddf-a42d9ff323d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_SA_019bffb2-01b2-7776-970a-69b92b18f05f" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_SA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_d73a10ce-ccd9-4933-a6cc-b7ac18e1d4a4" xlink:to="loc_country_SA_019bffb2-01b2-7776-970a-69b92b18f05f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncurrentAssets_3ae15837-dd8d-4403-8190-42a14753682a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_1cd3c80d-3eb5-4e36-9b23-b1bc10ab6dd8" xlink:to="loc_us-gaap_NoncurrentAssets_3ae15837-dd8d-4403-8190-42a14753682a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://lucidmotors.com/role/SUBSEQUENTEVENTDetails" xlink:type="simple" xlink:href="lcid-20251231.xsd#SUBSEQUENTEVENTDetails"/>
  <link:definitionLink xlink:role="http://lucidmotors.com/role/SUBSEQUENTEVENTDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_019c65ec-f1e2-7b67-bb65-779e4798890c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_019c65ec-f1e2-7d32-b6a1-0782b48430d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_019c65ec-f1e2-7b67-bb65-779e4798890c" xlink:to="loc_us-gaap_SubsequentEventTable_019c65ec-f1e2-7d32-b6a1-0782b48430d8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c65ec-f1e2-7e06-8cbe-0ecedc9a857c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019c65ec-f1e2-7d32-b6a1-0782b48430d8" xlink:to="loc_srt_RangeAxis_019c65ec-f1e2-7e06-8cbe-0ecedc9a857c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c65ec-f1e2-7e06-8cbe-0ecedc9a857c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c65ec-f1e2-7e06-8cbe-0ecedc9a857c" xlink:to="loc_srt_RangeMember_019c65ec-f1e2-7e06-8cbe-0ecedc9a857c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c65ec-f1e2-7604-a419-a855d85d098c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c65ec-f1e2-7e06-8cbe-0ecedc9a857c" xlink:to="loc_srt_RangeMember_019c65ec-f1e2-7604-a419-a855d85d098c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c65ec-f1e2-72eb-90de-a1a37c34ae98" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c65ec-f1e2-7604-a419-a855d85d098c" xlink:to="loc_srt_MinimumMember_019c65ec-f1e2-72eb-90de-a1a37c34ae98" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c65ec-f1e2-7bb1-a2c8-60f4c2cee98c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c65ec-f1e2-7604-a419-a855d85d098c" xlink:to="loc_srt_MaximumMember_019c65ec-f1e2-7bb1-a2c8-60f4c2cee98c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019c6c1e-8894-70a8-bffc-fc2f773db73d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019c65ec-f1e2-7d32-b6a1-0782b48430d8" xlink:to="loc_srt_StatementScenarioAxis_019c6c1e-8894-70a8-bffc-fc2f773db73d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c6c1e-8894-70a8-bffc-fc2f773db73d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019c6c1e-8894-70a8-bffc-fc2f773db73d" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c6c1e-8894-70a8-bffc-fc2f773db73d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c6c1e-8894-769b-b8d1-4e5dc25e738e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019c6c1e-8894-70a8-bffc-fc2f773db73d" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c6c1e-8894-769b-b8d1-4e5dc25e738e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_019c6c1e-97d5-71f2-b943-7d8650997438" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c6c1e-8894-769b-b8d1-4e5dc25e738e" xlink:to="loc_srt_ScenarioForecastMember_019c6c1e-97d5-71f2-b943-7d8650997438" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_019c65ec-f1e2-7575-b854-8123c019dbac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019c65ec-f1e2-7b67-bb65-779e4798890c" xlink:to="loc_us-gaap_RestructuringCharges_019c65ec-f1e2-7575-b854-8123c019dbac" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_OtherAssetsCurrent" xlink:type="arc" order="101"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:type="arc" order="102"/>
  </link:definitionLink>
</link:linkbase>
