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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019f13e5-22dd-7a1e-89eb-3a5a90433f6d,g:2bd50d04-0c8f-4bbb-80d1-28be8b4f5dc3-->
<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://www.seadrill.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnaudited" xlink:type="simple" xlink:href="sdrl-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnaudited"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019f13e5-23ad-794d-892c-ca66f9155923" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:to="loc_us-gaap_StatementTable_019f13e5-23ad-794d-892c-ca66f9155923" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019f13e5-23ad-7920-ad2c-228f89561f45" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019f13e5-23ad-794d-892c-ca66f9155923" xlink:to="loc_srt_ProductOrServiceAxis_019f13e5-23ad-7920-ad2c-228f89561f45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019f13e5-23ad-7920-ad2c-228f89561f45_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019f13e5-23ad-7920-ad2c-228f89561f45" xlink:to="loc_srt_ProductsAndServicesDomain_019f13e5-23ad-7920-ad2c-228f89561f45_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019f13e5-23ad-7c75-b1d0-3ed0a5d69aab" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019f13e5-23ad-7920-ad2c-228f89561f45" xlink:to="loc_srt_ProductsAndServicesDomain_019f13e5-23ad-7c75-b1d0-3ed0a5d69aab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_ReimbursableMember_019f13e5-23ad-70ec-b562-d3775db0a3af" xlink:href="sdrl-20260630.xsd#sdrl_ReimbursableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f13e5-23ad-7c75-b1d0-3ed0a5d69aab" xlink:to="loc_sdrl_ReimbursableMember_019f13e5-23ad-70ec-b562-d3775db0a3af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_019f13e5-23ad-79a9-bb14-b6782341c147" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f13e5-23ad-7c75-b1d0-3ed0a5d69aab" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_019f13e5-23ad-79a9-bb14-b6782341c147" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_VesselandRigMember_019f13e5-23ad-7b17-af47-7ed1b5ad5876" xlink:href="sdrl-20260630.xsd#sdrl_VesselandRigMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019f13e5-23ad-7c75-b1d0-3ed0a5d69aab" xlink:to="loc_sdrl_VesselandRigMember_019f13e5-23ad-7b17-af47-7ed1b5ad5876" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_019f13e5-23ad-7d3f-ad3f-659a3787d6ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:to="loc_us-gaap_RevenuesAbstract_019f13e5-23ad-7d3f-ad3f-659a3787d6ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f13e5-23ad-7acb-894f-93ddeccc651c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019f13e5-23ad-7d3f-ad3f-659a3787d6ab" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019f13e5-23ad-7acb-894f-93ddeccc651c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueNotFromContractWithCustomer_019f13e5-23ad-7466-9133-4bef0e20bbd0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueNotFromContractWithCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019f13e5-23ad-7d3f-ad3f-659a3787d6ab" xlink:to="loc_us-gaap_RevenueNotFromContractWithCustomer_019f13e5-23ad-7466-9133-4bef0e20bbd0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_ManagementContractRevenues_019f13e5-23ad-77dd-a032-68c7bbe2fb86" xlink:href="sdrl-20260630.xsd#sdrl_ManagementContractRevenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019f13e5-23ad-7d3f-ad3f-659a3787d6ab" xlink:to="loc_sdrl_ManagementContractRevenues_019f13e5-23ad-77dd-a032-68c7bbe2fb86" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLeaseIncome_019f13e5-23ad-7959-b3a2-b98265dc0bce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLeaseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019f13e5-23ad-7d3f-ad3f-659a3787d6ab" xlink:to="loc_us-gaap_OperatingLeaseLeaseIncome_019f13e5-23ad-7959-b3a2-b98265dc0bce" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019f13e5-23ad-7e75-afcc-f229d6b05ce5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019f13e5-23ad-7d3f-ad3f-659a3787d6ab" xlink:to="loc_us-gaap_Revenues_019f13e5-23ad-7e75-afcc-f229d6b05ce5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_019f13e5-23ad-7330-9140-a92eae277814" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_019f13e5-23ad-7330-9140-a92eae277814" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019f13e5-23ad-7ee9-bc0e-8a6910ec3bf5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019f13e5-23ad-7330-9140-a92eae277814" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019f13e5-23ad-7ee9-bc0e-8a6910ec3bf5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019f13e5-23ad-7ead-914e-6c779f55d673" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019f13e5-23ad-7330-9140-a92eae277814" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019f13e5-23ad-7ead-914e-6c779f55d673" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_ManagementContractExpenses_019f13e5-23ad-74d5-bcbd-38ff8431c3cf" xlink:href="sdrl-20260630.xsd#sdrl_ManagementContractExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019f13e5-23ad-7330-9140-a92eae277814" xlink:to="loc_sdrl_ManagementContractExpenses_019f13e5-23ad-74d5-bcbd-38ff8431c3cf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019f13e5-23ad-76af-805f-3435bdee63a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019f13e5-23ad-7330-9140-a92eae277814" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019f13e5-23ad-76af-805f-3435bdee63a5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019f13e5-23ad-7b7a-94de-bf0c2a4a9b8b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019f13e5-23ad-7330-9140-a92eae277814" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019f13e5-23ad-7b7a-94de-bf0c2a4a9b8b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019f13e5-23ad-744b-92d7-f225a00e9453" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019f13e5-23ad-7330-9140-a92eae277814" xlink:to="loc_us-gaap_CostsAndExpenses_019f13e5-23ad-744b-92d7-f225a00e9453" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019f13e5-23ad-79d9-81d2-795e43ebb13b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:to="loc_us-gaap_OperatingIncomeLoss_019f13e5-23ad-79d9-81d2-795e43ebb13b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019f13e5-23ad-7e24-bcc8-ca70ace1c447" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019f13e5-23ad-7e24-bcc8-ca70ace1c447" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeNet_019f13e5-23ad-787e-af84-02279992dc85" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019f13e5-23ad-7e24-bcc8-ca70ace1c447" xlink:to="loc_us-gaap_InvestmentIncomeNet_019f13e5-23ad-787e-af84-02279992dc85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019f13e5-23ad-7844-b58f-606bb1d9e099" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019f13e5-23ad-7e24-bcc8-ca70ace1c447" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019f13e5-23ad-7844-b58f-606bb1d9e099" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019f13e5-23ad-7c89-b412-c0fe0521c2fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019f13e5-23ad-7e24-bcc8-ca70ace1c447" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019f13e5-23ad-7c89-b412-c0fe0521c2fc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019f13e5-23ad-7127-a1a8-d98ace7c50ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019f13e5-23ad-7e24-bcc8-ca70ace1c447" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019f13e5-23ad-7127-a1a8-d98ace7c50ee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019f13e5-23ad-7a7f-8671-eb22f5b77198" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019f13e5-23ad-7e24-bcc8-ca70ace1c447" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_019f13e5-23ad-7a7f-8671-eb22f5b77198" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f13e5-23ad-78d3-9c22-c12eaa1af456" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019f13e5-23ad-78d3-9c22-c12eaa1af456" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019f13e5-23ad-7526-aa42-27edaf978c32" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019f13e5-23ad-7526-aa42-27edaf978c32" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019f13e5-23ad-72e7-a651-4836bccdaf78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:to="loc_us-gaap_NetIncomeLoss_019f13e5-23ad-72e7-a651-4836bccdaf78" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019f13e5-23ad-7269-8d35-9f14ef3f91ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:to="loc_us-gaap_EarningsPerShareBasic_019f13e5-23ad-7269-8d35-9f14ef3f91ee" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019f13e5-23ad-750e-8a9e-d0317f00c5b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-7b80-a7d7-20eaaa66d132" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019f13e5-23ad-750e-8a9e-d0317f00c5b5" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnauditedParenthetical" xlink:type="simple" xlink:href="sdrl-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnauditedParenthetical"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSUnauditedParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019f13e5-23ad-76a4-86c6-1e72ee6d0f24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019f13e5-23ad-77df-b621-860ac652f0de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-76a4-86c6-1e72ee6d0f24" xlink:to="loc_us-gaap_StatementTable_019f13e5-23ad-77df-b621-860ac652f0de" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f13e5-23ad-722c-ab17-e0fc49ba6b4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019f13e5-23ad-77df-b621-860ac652f0de" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f13e5-23ad-722c-ab17-e0fc49ba6b4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f13e5-23ad-722c-ab17-e0fc49ba6b4d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f13e5-23ad-722c-ab17-e0fc49ba6b4d" xlink:to="loc_us-gaap_RelatedPartyDomain_019f13e5-23ad-722c-ab17-e0fc49ba6b4d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f13e5-23ad-756d-b19f-fc3efd400fc6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f13e5-23ad-722c-ab17-e0fc49ba6b4d" xlink:to="loc_us-gaap_RelatedPartyDomain_019f13e5-23ad-756d-b19f-fc3efd400fc6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019f13e5-23ad-7f98-b995-6afc529dbfd8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f13e5-23ad-756d-b19f-fc3efd400fc6" xlink:to="loc_us-gaap_RelatedPartyMember_019f13e5-23ad-7f98-b995-6afc529dbfd8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019f13e5-23ad-77d6-a1d3-0dc0f108dcd6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-76a4-86c6-1e72ee6d0f24" xlink:to="loc_us-gaap_Revenues_019f13e5-23ad-77d6-a1d3-0dc0f108dcd6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYUnaudited" xlink:type="simple" xlink:href="sdrl-20260630.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYUnaudited"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITYUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019f13e5-23ad-786e-b80e-031fdcd9a76a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019f13e5-23ad-771d-8acb-f0847988c80e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-786e-b80e-031fdcd9a76a" xlink:to="loc_us-gaap_StatementTable_019f13e5-23ad-771d-8acb-f0847988c80e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019f13e5-23ad-7683-8fd6-23f38084e572" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019f13e5-23ad-771d-8acb-f0847988c80e" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019f13e5-23ad-7683-8fd6-23f38084e572" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019f13e5-23ad-7683-8fd6-23f38084e572_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019f13e5-23ad-7683-8fd6-23f38084e572" xlink:to="loc_us-gaap_EquityComponentDomain_019f13e5-23ad-7683-8fd6-23f38084e572_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019f13e5-23ad-79cb-b21e-f2dfc6e0f7f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019f13e5-23ad-7683-8fd6-23f38084e572" xlink:to="loc_us-gaap_EquityComponentDomain_019f13e5-23ad-79cb-b21e-f2dfc6e0f7f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019f13e5-23ad-7625-98b3-8624f4b90c03" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019f13e5-23ad-79cb-b21e-f2dfc6e0f7f6" xlink:to="loc_us-gaap_CommonStockMember_019f13e5-23ad-7625-98b3-8624f4b90c03" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019f13e5-23ad-7c2f-b13a-e4b579215c30" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019f13e5-23ad-79cb-b21e-f2dfc6e0f7f6" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019f13e5-23ad-7c2f-b13a-e4b579215c30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019f13e5-23ad-79b1-b065-f115f86171b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019f13e5-23ad-79cb-b21e-f2dfc6e0f7f6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019f13e5-23ad-79b1-b065-f115f86171b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019f13e5-23ad-7e2a-b8b1-867d579f7ad8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019f13e5-23ad-79cb-b21e-f2dfc6e0f7f6" xlink:to="loc_us-gaap_RetainedEarningsMember_019f13e5-23ad-7e2a-b8b1-867d579f7ad8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f13e5-23ad-7591-976e-07870aee48f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019f13e5-23ad-786e-b80e-031fdcd9a76a" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f13e5-23ad-7591-976e-07870aee48f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019f13e5-23ad-7fd9-9a7e-067abddefe5a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f13e5-23ad-7591-976e-07870aee48f7" xlink:to="loc_us-gaap_StockholdersEquity_019f13e5-23ad-7fd9-9a7e-067abddefe5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019f13e5-2499-7335-95b9-705a5936cab2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f13e5-23ad-7591-976e-07870aee48f7" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019f13e5-2499-7335-95b9-705a5936cab2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019fd29c-6aba-7290-bbc8-6a1e373368a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f13e5-23ad-7591-976e-07870aee48f7" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019fd29c-6aba-7290-bbc8-6a1e373368a1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019f13e5-2499-727d-a032-6822ac56e22a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f13e5-23ad-7591-976e-07870aee48f7" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019f13e5-2499-727d-a032-6822ac56e22a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019f13e5-2499-795b-b387-ea79ca856a68" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019f13e5-23ad-7591-976e-07870aee48f7" xlink:to="loc_us-gaap_NetIncomeLoss_019f13e5-2499-795b-b387-ea79ca856a68" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019f13e5-2499-7254-93f5-ebde252cda2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/RevenuefromcontractswithcustomersGeographicDetails" xlink:type="simple" xlink:href="sdrl-20260630.xsd#RevenuefromcontractswithcustomersGeographicDetails"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/RevenuefromcontractswithcustomersGeographicDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019f13e5-2499-75f7-8e90-0ceb02d00406" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019f13e5-2499-73cb-acb9-247b32f4e5f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019f13e5-2499-75f7-8e90-0ceb02d00406" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019f13e5-2499-73cb-acb9-247b32f4e5f0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019f13e5-2499-7430-abd0-df37cb8ff635" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019f13e5-2499-73cb-acb9-247b32f4e5f0" xlink:to="loc_srt_StatementGeographicalAxis_019f13e5-2499-7430-abd0-df37cb8ff635" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f13e5-2499-7430-abd0-df37cb8ff635_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019f13e5-2499-7430-abd0-df37cb8ff635" xlink:to="loc_srt_SegmentGeographicalDomain_019f13e5-2499-7430-abd0-df37cb8ff635_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f13e5-2499-7733-a98d-1ed92165e325" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019f13e5-2499-7430-abd0-df37cb8ff635" xlink:to="loc_srt_SegmentGeographicalDomain_019f13e5-2499-7733-a98d-1ed92165e325" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_BR_019f13e5-2499-7a69-ae21-1c14cb7e0d10" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_BR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f13e5-2499-7733-a98d-1ed92165e325" xlink:to="loc_country_BR_019f13e5-2499-7a69-ae21-1c14cb7e0d10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019f13e5-2499-742d-b15b-ab0f62bdf818" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f13e5-2499-7733-a98d-1ed92165e325" xlink:to="loc_country_US_019f13e5-2499-742d-b15b-ab0f62bdf818" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_AO_019f13e5-2499-732b-8143-90e83752c87f" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_AO"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f13e5-2499-7733-a98d-1ed92165e325" xlink:to="loc_country_AO_019f13e5-2499-732b-8143-90e83752c87f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_OtherGeographicSegmentMember_019f13e5-2499-736b-a638-1fbbf6fc5bd6" xlink:href="sdrl-20260630.xsd#sdrl_OtherGeographicSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f13e5-2499-7733-a98d-1ed92165e325" xlink:to="loc_sdrl_OtherGeographicSegmentMember_019f13e5-2499-736b-a638-1fbbf6fc5bd6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019f13e5-2499-7f9b-ade9-6c38b6d47cee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesFromExternalCustomersAndLongLivedAssetsLineItems_019f13e5-2499-75f7-8e90-0ceb02d00406" xlink:to="loc_us-gaap_Revenues_019f13e5-2499-7f9b-ade9-6c38b6d47cee" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/RevenuefromcontractswithcustomersMajorCustomersDetails" xlink:type="simple" xlink:href="sdrl-20260630.xsd#RevenuefromcontractswithcustomersMajorCustomersDetails"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/RevenuefromcontractswithcustomersMajorCustomersDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019f13e5-2499-7305-a70f-66069c06de6b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EntityWideRevenueMajorCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_019f13e5-2499-71ec-8454-89a9f19e2b49" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019f13e5-2499-7305-a70f-66069c06de6b" xlink:to="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_019f13e5-2499-71ec-8454-89a9f19e2b49" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f13e5-2499-79d5-ad3a-3503c70a6db6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_019f13e5-2499-71ec-8454-89a9f19e2b49" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f13e5-2499-79d5-ad3a-3503c70a6db6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f13e5-2499-79d5-ad3a-3503c70a6db6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f13e5-2499-79d5-ad3a-3503c70a6db6" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f13e5-2499-79d5-ad3a-3503c70a6db6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f13e5-2499-7015-9219-c07d5f6c0954" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019f13e5-2499-79d5-ad3a-3503c70a6db6" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f13e5-2499-7015-9219-c07d5f6c0954" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_ContractRevenuesMember_019f13e5-2499-7c23-b262-e5c6c791f1a0" xlink:href="sdrl-20260630.xsd#sdrl_ContractRevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019f13e5-2499-7015-9219-c07d5f6c0954" xlink:to="loc_sdrl_ContractRevenuesMember_019f13e5-2499-7c23-b262-e5c6c791f1a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019f13e5-2499-774b-939b-82e9676e2232" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_019f13e5-2499-71ec-8454-89a9f19e2b49" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019f13e5-2499-774b-939b-82e9676e2232" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019f13e5-2499-774b-939b-82e9676e2232_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019f13e5-2499-774b-939b-82e9676e2232" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019f13e5-2499-774b-939b-82e9676e2232_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019f13e5-2499-7068-845b-046ebeca6780" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019f13e5-2499-774b-939b-82e9676e2232" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019f13e5-2499-7068-845b-046ebeca6780" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_019f13e5-2499-7f30-86b3-7ae2abadb17e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019f13e5-2499-7068-845b-046ebeca6780" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_019f13e5-2499-7f30-86b3-7ae2abadb17e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_019f13e5-2499-736b-bd26-ebda9fa5cc6c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable_019f13e5-2499-71ec-8454-89a9f19e2b49" xlink:to="loc_srt_MajorCustomersAxis_019f13e5-2499-736b-bd26-ebda9fa5cc6c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019f13e5-2499-736b-bd26-ebda9fa5cc6c_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_019f13e5-2499-736b-bd26-ebda9fa5cc6c" xlink:to="loc_srt_NameOfMajorCustomerDomain_019f13e5-2499-736b-bd26-ebda9fa5cc6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_019f13e5-2499-7b14-ae31-11bf702d0d81" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_019f13e5-2499-736b-bd26-ebda9fa5cc6c" xlink:to="loc_srt_NameOfMajorCustomerDomain_019f13e5-2499-7b14-ae31-11bf702d0d81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_PetrobrasMember_019f13e5-2499-72fe-915f-f3e6df8273d7" xlink:href="sdrl-20260630.xsd#sdrl_PetrobrasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f13e5-2499-7b14-ae31-11bf702d0d81" xlink:to="loc_sdrl_PetrobrasMember_019f13e5-2499-72fe-915f-f3e6df8273d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SonadrillMember_019f13e5-2499-705e-b483-0c0f2e54c6a9" xlink:href="sdrl-20260630.xsd#sdrl_SonadrillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f13e5-2499-7b14-ae31-11bf702d0d81" xlink:to="loc_sdrl_SonadrillMember_019f13e5-2499-705e-b483-0c0f2e54c6a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_WaterOilAndGasMember_019fd2a1-1d34-77fb-8e2a-e287d1c30a08" xlink:href="sdrl-20260630.xsd#sdrl_WaterOilAndGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f13e5-2499-7b14-ae31-11bf702d0d81" xlink:to="loc_sdrl_WaterOilAndGasMember_019fd2a1-1d34-77fb-8e2a-e287d1c30a08" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_LLOGMember_019f13e5-2499-7ad0-8fd7-dff73252c193" xlink:href="sdrl-20260630.xsd#sdrl_LLOGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f13e5-2499-7b14-ae31-11bf702d0d81" xlink:to="loc_sdrl_LLOGMember_019f13e5-2499-7ad0-8fd7-dff73252c193" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_TalosMember_019f13e5-2499-7ad7-958c-453a532509e9" xlink:href="sdrl-20260630.xsd#sdrl_TalosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f13e5-2499-7b14-ae31-11bf702d0d81" xlink:to="loc_sdrl_TalosMember_019f13e5-2499-7ad7-958c-453a532509e9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_OtherCustomersMember_019f13e5-2499-7049-9cfe-0806038911a3" xlink:href="sdrl-20260630.xsd#sdrl_OtherCustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_019f13e5-2499-7b14-ae31-11bf702d0d81" xlink:to="loc_sdrl_OtherCustomersMember_019f13e5-2499-7049-9cfe-0806038911a3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019f13e5-2499-77f4-9a6f-c07476fe6989" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideRevenueMajorCustomerLineItems_019f13e5-2499-7305-a70f-66069c06de6b" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019f13e5-2499-77f4-9a6f-c07476fe6989" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/RestrictedcashDetails" xlink:type="simple" xlink:href="sdrl-20260630.xsd#RestrictedcashDetails"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/RestrictedcashDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_019f13e5-2499-738c-b4be-cdb9c7385400" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_019f13e5-2499-7da4-b00a-c82918f3a140" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_019f13e5-2499-738c-b4be-cdb9c7385400" xlink:to="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_019f13e5-2499-7da4-b00a-c82918f3a140" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_019f13e5-2499-73b4-9913-b04c59404bd8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTable_019f13e5-2499-7da4-b00a-c82918f3a140" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_019f13e5-2499-73b4-9913-b04c59404bd8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019f13e5-2499-73b4-9913-b04c59404bd8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_019f13e5-2499-73b4-9913-b04c59404bd8" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019f13e5-2499-73b4-9913-b04c59404bd8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019f13e5-2499-7b03-8595-5ad3256bcbb3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsAxis_019f13e5-2499-73b4-9913-b04c59404bd8" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019f13e5-2499-7b03-8595-5ad3256bcbb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_CashHeldInEscrowMember_019f13e5-2499-7be5-b5c9-ea1ee88e0a1d" xlink:href="sdrl-20260630.xsd#sdrl_CashHeldInEscrowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019f13e5-2499-7b03-8595-5ad3256bcbb3" xlink:to="loc_sdrl_CashHeldInEscrowMember_019f13e5-2499-7be5-b5c9-ea1ee88e0a1d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_CashPledgedAsCollateralOtherMember_019f13e5-2499-75ea-a115-b5bc2f8815a9" xlink:href="sdrl-20260630.xsd#sdrl_CashPledgedAsCollateralOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019f13e5-2499-7b03-8595-5ad3256bcbb3" xlink:to="loc_sdrl_CashPledgedAsCollateralOtherMember_019f13e5-2499-75ea-a115-b5bc2f8815a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalents_019f13e5-2499-77e1-8c9a-0e499f5f3828" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsItemsLineItems_019f13e5-2499-738c-b4be-cdb9c7385400" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalents_019f13e5-2499-77e1-8c9a-0e499f5f3828" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/EquitymethodinvestmentDetails" xlink:type="simple" xlink:href="sdrl-20260630.xsd#EquitymethodinvestmentDetails"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/EquitymethodinvestmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019f13e5-2499-71aa-8000-fe4a9bfa86e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019f13e5-2499-7e08-a8bb-d25a53efd2d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019f13e5-2499-71aa-8000-fe4a9bfa86e7" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019f13e5-2499-7e08-a8bb-d25a53efd2d9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019f13e5-2499-74d7-a004-466e8dba981a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019f13e5-2499-7e08-a8bb-d25a53efd2d9" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019f13e5-2499-74d7-a004-466e8dba981a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019f13e5-2499-74d7-a004-466e8dba981a_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019f13e5-2499-74d7-a004-466e8dba981a" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019f13e5-2499-74d7-a004-466e8dba981a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019f13e5-2499-79c9-a0b4-628c1485a62c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019f13e5-2499-74d7-a004-466e8dba981a" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019f13e5-2499-79c9-a0b4-628c1485a62c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SonadrillMember_019f13e5-2499-74ae-a208-fe5cd7fc0195" xlink:href="sdrl-20260630.xsd#sdrl_SonadrillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019f13e5-2499-79c9-a0b4-628c1485a62c" xlink:to="loc_sdrl_SonadrillMember_019f13e5-2499-74ae-a208-fe5cd7fc0195" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019f13e5-2499-7bab-ae3f-61ed8af77fcd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019f13e5-2499-71aa-8000-fe4a9bfa86e7" xlink:to="loc_us-gaap_EquityMethodInvestments_019f13e5-2499-7bab-ae3f-61ed8af77fcd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/DebtScheduleofDebtDetails" xlink:type="simple" xlink:href="sdrl-20260630.xsd#DebtScheduleofDebtDetails"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/DebtScheduleofDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7c93-9952-e4b0a36a236e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-766c-9a8a-210c445010b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7c93-9952-e4b0a36a236e" xlink:to="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-766c-9a8a-210c445010b0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7143-b587-0fa4579823f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-766c-9a8a-210c445010b0" xlink:to="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7143-b587-0fa4579823f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7143-b587-0fa4579823f2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7143-b587-0fa4579823f2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7143-b587-0fa4579823f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-77e9-a350-dac162adc842" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7143-b587-0fa4579823f2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-77e9-a350-dac162adc842" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SeniorNotesDue2034Member_019fd2dc-b306-78e1-ba12-753c4c8e08f0" xlink:href="sdrl-20260630.xsd#sdrl_SeniorNotesDue2034Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-77e9-a350-dac162adc842" xlink:to="loc_sdrl_SeniorNotesDue2034Member_019fd2dc-b306-78e1-ba12-753c4c8e08f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SecondLienFacilityMember_019f13e5-2499-7626-960e-8868c4dab603" xlink:href="sdrl-20260630.xsd#sdrl_SecondLienFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-77e9-a350-dac162adc842" xlink:to="loc_sdrl_SecondLienFacilityMember_019f13e5-2499-7626-960e-8868c4dab603" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_UnsecuredConvertibleNotesMember_019f13e5-2499-7ecd-869e-d130f644091f" xlink:href="sdrl-20260630.xsd#sdrl_UnsecuredConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-77e9-a350-dac162adc842" xlink:to="loc_sdrl_UnsecuredConvertibleNotesMember_019f13e5-2499-7ecd-869e-d130f644091f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7cd6-a4de-327971ddf8da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-766c-9a8a-210c445010b0" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7cd6-a4de-327971ddf8da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-7cd6-a4de-327971ddf8da_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7cd6-a4de-327971ddf8da" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-7cd6-a4de-327971ddf8da_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-78ef-b5c4-2e8c1aed78dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7cd6-a4de-327971ddf8da" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-78ef-b5c4-2e8c1aed78dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019fd2dc-08fb-7883-be57-9d1290966d9a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-78ef-b5c4-2e8c1aed78dc" xlink:to="loc_us-gaap_SeniorNotesMember_019fd2dc-08fb-7883-be57-9d1290966d9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019f13e5-2499-77de-915e-f79610e07670" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-78ef-b5c4-2e8c1aed78dc" xlink:to="loc_us-gaap_SecuredDebtMember_019f13e5-2499-77de-915e-f79610e07670" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_019f13e5-2499-7ecd-8a22-06f7963ddda0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-78ef-b5c4-2e8c1aed78dc" xlink:to="loc_us-gaap_UnsecuredDebtMember_019f13e5-2499-7ecd-8a22-06f7963ddda0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019f13e5-2499-7a95-bf1e-d186d0b0a581" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7c93-9952-e4b0a36a236e" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019f13e5-2499-7a95-bf1e-d186d0b0a581" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019f13e5-2499-7ee3-a03d-514e565dc74d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7c93-9952-e4b0a36a236e" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019f13e5-2499-7ee3-a03d-514e565dc74d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedPremium_019f13e5-2499-7e3a-8f6e-6e8365c20929" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentUnamortizedPremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7c93-9952-e4b0a36a236e" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedPremium_019f13e5-2499-7e3a-8f6e-6e8365c20929" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_019f13e5-2499-72a3-a60d-13eb6398295d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7c93-9952-e4b0a36a236e" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_019f13e5-2499-72a3-a60d-13eb6398295d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019f13e5-2499-76df-ab35-a53cfd561e11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7c93-9952-e4b0a36a236e" xlink:to="loc_us-gaap_LongTermDebt_019f13e5-2499-76df-ab35-a53cfd561e11" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/DebtNarrativeDetails" xlink:type="simple" xlink:href="sdrl-20260630.xsd#DebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/DebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-713b-8a7a-3f696fe51718" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-713b-8a7a-3f696fe51718" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019f665f-325c-7f9e-bdc5-db36a3302626" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-713b-8a7a-3f696fe51718" xlink:to="loc_us-gaap_DebtInstrumentAxis_019f665f-325c-7f9e-bdc5-db36a3302626" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f665f-325c-7f9e-bdc5-db36a3302626_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f665f-325c-7f9e-bdc5-db36a3302626" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f665f-325c-7f9e-bdc5-db36a3302626_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f665f-325c-7e8e-8e8e-94778f00667d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f665f-325c-7f9e-bdc5-db36a3302626" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f665f-325c-7e8e-8e8e-94778f00667d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SeniorNotesDue2034Member_019f665f-325c-755a-8b18-213b9a9a472a" xlink:href="sdrl-20260630.xsd#sdrl_SeniorNotesDue2034Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f665f-325c-7e8e-8e8e-94778f00667d" xlink:to="loc_sdrl_SeniorNotesDue2034Member_019f665f-325c-755a-8b18-213b9a9a472a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SecondLienFacilityMember_019f665f-325c-7cca-a87b-bc4a482ca240" xlink:href="sdrl-20260630.xsd#sdrl_SecondLienFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f665f-325c-7e8e-8e8e-94778f00667d" xlink:to="loc_sdrl_SecondLienFacilityMember_019f665f-325c-7cca-a87b-bc4a482ca240" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_FiveYearFirstLienRevolvingCreditFacilityMember_019f665f-325c-7406-bc8d-ed2336ee6bbb" xlink:href="sdrl-20260630.xsd#sdrl_FiveYearFirstLienRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f665f-325c-7e8e-8e8e-94778f00667d" xlink:to="loc_sdrl_FiveYearFirstLienRevolvingCreditFacilityMember_019f665f-325c-7406-bc8d-ed2336ee6bbb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_UnsecuredConvertibleNotesMember_019f665f-6387-7990-9fad-148a405df67e" xlink:href="sdrl-20260630.xsd#sdrl_UnsecuredConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f665f-325c-7e8e-8e8e-94778f00667d" xlink:to="loc_sdrl_UnsecuredConvertibleNotesMember_019f665f-6387-7990-9fad-148a405df67e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019f665f-325c-75bd-a163-f4af268def69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-713b-8a7a-3f696fe51718" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019f665f-325c-75bd-a163-f4af268def69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019f665f-325c-75bd-a163-f4af268def69_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019f665f-325c-75bd-a163-f4af268def69" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019f665f-325c-75bd-a163-f4af268def69_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019f665f-325c-76e2-aff8-cdcc2d46571d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019f665f-325c-75bd-a163-f4af268def69" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019f665f-325c-76e2-aff8-cdcc2d46571d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019f665f-325c-7390-a133-37a339894cf8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f665f-325c-76e2-aff8-cdcc2d46571d" xlink:to="loc_us-gaap_SeniorNotesMember_019f665f-325c-7390-a133-37a339894cf8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019f665f-325c-7431-9333-35b81fa34532" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f665f-325c-76e2-aff8-cdcc2d46571d" xlink:to="loc_us-gaap_SecuredDebtMember_019f665f-325c-7431-9333-35b81fa34532" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_019f665f-6388-7c70-9260-12dc328a339e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f665f-325c-76e2-aff8-cdcc2d46571d" xlink:to="loc_us-gaap_ConvertibleDebtMember_019f665f-6388-7c70-9260-12dc328a339e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019f665f-325c-7aac-89e6-fe1523db5ca0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-713b-8a7a-3f696fe51718" xlink:to="loc_us-gaap_CreditFacilityAxis_019f665f-325c-7aac-89e6-fe1523db5ca0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019f665f-325c-7aac-89e6-fe1523db5ca0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019f665f-325c-7aac-89e6-fe1523db5ca0" xlink:to="loc_us-gaap_CreditFacilityDomain_019f665f-325c-7aac-89e6-fe1523db5ca0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019f665f-325c-79d3-a3e0-d0ee8e912f61" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019f665f-325c-7aac-89e6-fe1523db5ca0" xlink:to="loc_us-gaap_CreditFacilityDomain_019f665f-325c-79d3-a3e0-d0ee8e912f61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019f665f-325c-788b-a1a3-d9e8777cccbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019f665f-325c-79d3-a3e0-d0ee8e912f61" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019f665f-325c-788b-a1a3-d9e8777cccbb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019f665f-325c-7527-9998-73ce37fddb55" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019f665f-325c-79d3-a3e0-d0ee8e912f61" xlink:to="loc_us-gaap_LetterOfCreditMember_019f665f-325c-7527-9998-73ce37fddb55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019f665f-6387-7bb8-9364-5b78e356866a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-713b-8a7a-3f696fe51718" xlink:to="loc_srt_RangeAxis_019f665f-6387-7bb8-9364-5b78e356866a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f665f-6387-7bb8-9364-5b78e356866a_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019f665f-6387-7bb8-9364-5b78e356866a" xlink:to="loc_srt_RangeMember_019f665f-6387-7bb8-9364-5b78e356866a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019f665f-6387-7b66-bbb5-7fdbaf5e2ca1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019f665f-6387-7bb8-9364-5b78e356866a" xlink:to="loc_srt_RangeMember_019f665f-6387-7b66-bbb5-7fdbaf5e2ca1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019f665f-6387-75aa-98d4-b6519881a5d1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f665f-6387-7b66-bbb5-7fdbaf5e2ca1" xlink:to="loc_srt_MinimumMember_019f665f-6387-75aa-98d4-b6519881a5d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019f665f-6387-791d-a52d-30b5a879d7ea" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019f665f-6387-7b66-bbb5-7fdbaf5e2ca1" xlink:to="loc_srt_MaximumMember_019f665f-6387-791d-a52d-30b5a879d7ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019f665f-6387-770b-bd3b-762aa292e938" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-713b-8a7a-3f696fe51718" xlink:to="loc_srt_StatementScenarioAxis_019f665f-6387-770b-bd3b-762aa292e938" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019f665f-6387-770b-bd3b-762aa292e938_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019f665f-6387-770b-bd3b-762aa292e938" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019f665f-6387-770b-bd3b-762aa292e938_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019f665f-6387-7e40-8389-b51297e0a0c7" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019f665f-6387-770b-bd3b-762aa292e938" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019f665f-6387-7e40-8389-b51297e0a0c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_019f665f-6388-7d1c-baab-181c9af325fe" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019f665f-6387-7e40-8389-b51297e0a0c7" xlink:to="loc_srt_ScenarioForecastMember_019f665f-6388-7d1c-baab-181c9af325fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019f665f-6388-7628-94e7-9ba1ecb4a689" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019f13e5-2499-713b-8a7a-3f696fe51718" xlink:to="loc_srt_CounterpartyNameAxis_019f665f-6388-7628-94e7-9ba1ecb4a689" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f665f-6388-7628-94e7-9ba1ecb4a689_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019f665f-6388-7628-94e7-9ba1ecb4a689" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f665f-6388-7628-94e7-9ba1ecb4a689_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f665f-6388-79f7-909c-85510a160d39" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019f665f-6388-7628-94e7-9ba1ecb4a689" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f665f-6388-79f7-909c-85510a160d39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SFLHerculesLtdMember_019f665f-6388-7b19-8811-10c41b117022" xlink:href="sdrl-20260630.xsd#sdrl_SFLHerculesLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f665f-6388-79f7-909c-85510a160d39" xlink:to="loc_sdrl_SFLHerculesLtdMember_019f665f-6388-7b19-8811-10c41b117022" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019f665f-325c-7a5c-882b-9072a55e2607" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019f665f-325c-7a5c-882b-9072a55e2607" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019f665f-325c-785a-b798-163fde2dddc8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019f665f-325c-785a-b798-163fde2dddc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019f665f-325c-7bc3-b374-9b9dd9127e1c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019f665f-325c-7bc3-b374-9b9dd9127e1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019f665f-325c-7f53-9111-2111cb093f44" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_DebtInstrumentTerm_019f665f-325c-7f53-9111-2111cb093f44" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019f665f-325c-7696-9fdd-3bfd5bd310cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019f665f-325c-7696-9fdd-3bfd5bd310cc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019f665f-325c-7688-9e4e-c1fc13806dfb" xlink:href="sdrl-20260630.xsd#sdrl_LineOfCreditFacilityAccordionFeatureIncreaseLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_sdrl_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019f665f-325c-7688-9e4e-c1fc13806dfb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019f665f-325c-77bc-b76a-55a86dc58b94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_LongTermDebt_019f665f-325c-77bc-b76a-55a86dc58b94" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019f665f-6388-7f52-8496-ce22abb62199" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019f665f-6388-7f52-8496-ce22abb62199" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019f665f-6388-7f7c-b7a0-69c07fc73a16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019f665f-6388-7f7c-b7a0-69c07fc73a16" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_019f665f-6388-7f93-a973-cc2053e61592" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_019f665f-6388-7f93-a973-cc2053e61592" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_019f665f-6388-7888-923c-b17ebf75322e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_019f665f-6388-7888-923c-b17ebf75322e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019f13e5-2499-7a16-9d21-a4819521f2c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019f13e5-2499-7336-875d-9ca92cbe5bc2" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_019f13e5-2499-7a16-9d21-a4819521f2c6" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/RelatedpartytransactionsRelatedPartyRevenueDetails" xlink:type="simple" xlink:href="sdrl-20260630.xsd#RelatedpartytransactionsRelatedPartyRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/RelatedpartytransactionsRelatedPartyRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019f13e5-2499-783d-ba65-fee607bab18d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f13e5-2499-7ecd-9a0d-33d97e00f523" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f13e5-2499-783d-ba65-fee607bab18d" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f13e5-2499-7ecd-9a0d-33d97e00f523" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019f13e5-2499-7109-847e-30ca6376575d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f13e5-2499-7ecd-9a0d-33d97e00f523" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019f13e5-2499-7109-847e-30ca6376575d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019f13e5-2499-7109-847e-30ca6376575d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019f13e5-2499-7109-847e-30ca6376575d" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019f13e5-2499-7109-847e-30ca6376575d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019f13e5-2499-7e21-903e-0942cba61b63" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019f13e5-2499-7109-847e-30ca6376575d" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019f13e5-2499-7e21-903e-0942cba61b63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_RelatedPartyRevenueManagementFeesMember_019f13e5-2499-7c1e-afdc-0514dd2a6bb6" xlink:href="sdrl-20260630.xsd#sdrl_RelatedPartyRevenueManagementFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019f13e5-2499-7e21-903e-0942cba61b63" xlink:to="loc_sdrl_RelatedPartyRevenueManagementFeesMember_019f13e5-2499-7c1e-afdc-0514dd2a6bb6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_RelatedPartyRevenueAddOnServicesMember_019f13e5-2499-7980-b0b1-af2eb094398b" xlink:href="sdrl-20260630.xsd#sdrl_RelatedPartyRevenueAddOnServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019f13e5-2499-7e21-903e-0942cba61b63" xlink:to="loc_sdrl_RelatedPartyRevenueAddOnServicesMember_019f13e5-2499-7980-b0b1-af2eb094398b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_RelatedPartyRevenueReimbursableRevenueMember_019f13e5-2499-700b-b7c0-fa909f3b3547" xlink:href="sdrl-20260630.xsd#sdrl_RelatedPartyRevenueReimbursableRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019f13e5-2499-7e21-903e-0942cba61b63" xlink:to="loc_sdrl_RelatedPartyRevenueReimbursableRevenueMember_019f13e5-2499-700b-b7c0-fa909f3b3547" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_RelatedPartyRevenueLeasingRevenueMember_019f13e5-2499-7882-a31c-c13d7484a769" xlink:href="sdrl-20260630.xsd#sdrl_RelatedPartyRevenueLeasingRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019f13e5-2499-7e21-903e-0942cba61b63" xlink:to="loc_sdrl_RelatedPartyRevenueLeasingRevenueMember_019f13e5-2499-7882-a31c-c13d7484a769" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f13e5-2499-785c-8055-0ab168df91dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019f13e5-2499-7ecd-9a0d-33d97e00f523" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f13e5-2499-785c-8055-0ab168df91dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f13e5-2499-785c-8055-0ab168df91dc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f13e5-2499-785c-8055-0ab168df91dc" xlink:to="loc_us-gaap_RelatedPartyDomain_019f13e5-2499-785c-8055-0ab168df91dc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019f13e5-2499-7868-af2c-cffddd951652" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019f13e5-2499-785c-8055-0ab168df91dc" xlink:to="loc_us-gaap_RelatedPartyDomain_019f13e5-2499-7868-af2c-cffddd951652" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019f13e5-2499-78b9-ba1d-7e28202c6eb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019f13e5-2499-7868-af2c-cffddd951652" xlink:to="loc_us-gaap_RelatedPartyMember_019f13e5-2499-78b9-ba1d-7e28202c6eb5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019f13e5-2499-7916-841c-4d073b9d9518" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019f13e5-2499-783d-ba65-fee607bab18d" xlink:to="loc_us-gaap_Revenues_019f13e5-2499-7916-841c-4d073b9d9518" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/FairvalueoffinancialinstrumentsCarryingValueandEstimatedFairValueofFinancialLiabilitiesDetails" xlink:type="simple" xlink:href="sdrl-20260630.xsd#FairvalueoffinancialinstrumentsCarryingValueandEstimatedFairValueofFinancialLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/FairvalueoffinancialinstrumentsCarryingValueandEstimatedFairValueofFinancialLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019f13e5-2499-7a7b-8454-36e8a4d4077d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019f13e5-2499-7749-9ad5-d81c269a854d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019f13e5-2499-7a7b-8454-36e8a4d4077d" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019f13e5-2499-7749-9ad5-d81c269a854d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019f13e5-2499-739c-9a18-cba41a47945c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019f13e5-2499-7749-9ad5-d81c269a854d" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019f13e5-2499-739c-9a18-cba41a47945c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019f13e5-2499-739c-9a18-cba41a47945c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019f13e5-2499-739c-9a18-cba41a47945c" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019f13e5-2499-739c-9a18-cba41a47945c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019f13e5-2499-71e4-ab00-eb143ea6c3f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019f13e5-2499-739c-9a18-cba41a47945c" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019f13e5-2499-71e4-ab00-eb143ea6c3f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019f13e5-2499-77ec-86d4-4faecad96197" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019f13e5-2499-71e4-ab00-eb143ea6c3f7" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019f13e5-2499-77ec-86d4-4faecad96197" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019f13e5-2499-7e74-a289-9683f3eb934a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019f13e5-2499-71e4-ab00-eb143ea6c3f7" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019f13e5-2499-7e74-a289-9683f3eb934a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019f13e5-2499-71e6-b750-d2d610f5937e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019f13e5-2499-7749-9ad5-d81c269a854d" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019f13e5-2499-71e6-b750-d2d610f5937e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019f13e5-2499-71e6-b750-d2d610f5937e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019f13e5-2499-71e6-b750-d2d610f5937e" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019f13e5-2499-71e6-b750-d2d610f5937e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019f13e5-2499-79c5-a626-0e3070b2c380" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019f13e5-2499-71e6-b750-d2d610f5937e" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019f13e5-2499-79c5-a626-0e3070b2c380" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019f13e5-2499-7e82-861b-50f99bdd9c9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019f13e5-2499-79c5-a626-0e3070b2c380" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019f13e5-2499-7e82-861b-50f99bdd9c9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019f13e5-2499-7b4f-be10-e500a4def8f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019f13e5-2499-7e82-861b-50f99bdd9c9d" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019f13e5-2499-7b4f-be10-e500a4def8f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019f13e5-2499-744a-bec3-a1f3b2779f19" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019f13e5-2499-7e82-861b-50f99bdd9c9d" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019f13e5-2499-744a-bec3-a1f3b2779f19" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7807-816d-9edb7ed48d2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019f13e5-2499-7749-9ad5-d81c269a854d" xlink:to="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7807-816d-9edb7ed48d2d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7807-816d-9edb7ed48d2d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7807-816d-9edb7ed48d2d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7807-816d-9edb7ed48d2d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7ac3-91a9-797066016f0e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7807-816d-9edb7ed48d2d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7ac3-91a9-797066016f0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SeniorNotesDue2034Member_019fd31d-550d-71ba-b496-a50c431e4be1" xlink:href="sdrl-20260630.xsd#sdrl_SeniorNotesDue2034Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7ac3-91a9-797066016f0e" xlink:to="loc_sdrl_SeniorNotesDue2034Member_019fd31d-550d-71ba-b496-a50c431e4be1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SecondLienFacilityMember_019f13e5-2499-7b02-ae23-b3f044cfd10e" xlink:href="sdrl-20260630.xsd#sdrl_SecondLienFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7ac3-91a9-797066016f0e" xlink:to="loc_sdrl_SecondLienFacilityMember_019f13e5-2499-7b02-ae23-b3f044cfd10e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_UnsecuredConvertibleNotesMember_019f13e5-2499-7466-9751-48f99c27f4f3" xlink:href="sdrl-20260630.xsd#sdrl_UnsecuredConvertibleNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7ac3-91a9-797066016f0e" xlink:to="loc_sdrl_UnsecuredConvertibleNotesMember_019f13e5-2499-7466-9751-48f99c27f4f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7204-a01d-c4443cf44597" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019f13e5-2499-7749-9ad5-d81c269a854d" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7204-a01d-c4443cf44597" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-7204-a01d-c4443cf44597_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7204-a01d-c4443cf44597" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-7204-a01d-c4443cf44597_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-7698-b23d-56f693a49613" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7204-a01d-c4443cf44597" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-7698-b23d-56f693a49613" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019fd31d-550d-7def-a9e5-f399e6682543" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-7698-b23d-56f693a49613" xlink:to="loc_us-gaap_SeniorNotesMember_019fd31d-550d-7def-a9e5-f399e6682543" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019f13e5-2499-7eac-8b48-9dce212e3d9f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-7698-b23d-56f693a49613" xlink:to="loc_us-gaap_SecuredDebtMember_019f13e5-2499-7eac-8b48-9dce212e3d9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019f13e5-2499-7070-bbcb-08dfa2b7be0b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019f13e5-2499-7a7b-8454-36e8a4d4077d" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019f13e5-2499-7070-bbcb-08dfa2b7be0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_019f13e5-2499-74aa-a606-175f0bc57fe8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019f13e5-2499-7a7b-8454-36e8a4d4077d" xlink:to="loc_us-gaap_DebtInstrumentFairValue_019f13e5-2499-74aa-a606-175f0bc57fe8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/FairvalueoffinancialinstrumentsNarrativeDetails" xlink:type="simple" xlink:href="sdrl-20260630.xsd#FairvalueoffinancialinstrumentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/FairvalueoffinancialinstrumentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019f13e5-2499-70a4-97bf-abff9d2490ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019f13e5-2499-789a-b2db-cc8e1402d179" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019f13e5-2499-70a4-97bf-abff9d2490ed" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019f13e5-2499-789a-b2db-cc8e1402d179" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7418-a1df-e8649a169388" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019f13e5-2499-789a-b2db-cc8e1402d179" xlink:to="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7418-a1df-e8649a169388" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7418-a1df-e8649a169388_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7418-a1df-e8649a169388" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7418-a1df-e8649a169388_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7916-b334-53303057bfed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7418-a1df-e8649a169388" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7916-b334-53303057bfed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SeniorNotesDue2034Member_019fd31e-d92b-7f47-9935-08ae365a650a" xlink:href="sdrl-20260630.xsd#sdrl_SeniorNotesDue2034Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7916-b334-53303057bfed" xlink:to="loc_sdrl_SeniorNotesDue2034Member_019fd31e-d92b-7f47-9935-08ae365a650a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SecondLienFacilityMember_019f13e5-2499-7a96-9a69-7095fb944c52" xlink:href="sdrl-20260630.xsd#sdrl_SecondLienFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7916-b334-53303057bfed" xlink:to="loc_sdrl_SecondLienFacilityMember_019f13e5-2499-7a96-9a69-7095fb944c52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7246-942d-f99ad28cc377" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019f13e5-2499-789a-b2db-cc8e1402d179" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7246-942d-f99ad28cc377" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-7246-942d-f99ad28cc377_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7246-942d-f99ad28cc377" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-7246-942d-f99ad28cc377_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-700d-bfb7-cb93ddd635bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019f13e5-2499-7246-942d-f99ad28cc377" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-700d-bfb7-cb93ddd635bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019fd31e-d92b-7706-8456-49deac709143" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-700d-bfb7-cb93ddd635bd" xlink:to="loc_us-gaap_SeniorNotesMember_019fd31e-d92b-7706-8456-49deac709143" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019f13e5-2499-7fda-aa95-6e5f06480b33" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019f13e5-2499-700d-bfb7-cb93ddd635bd" xlink:to="loc_us-gaap_SecuredDebtMember_019f13e5-2499-7fda-aa95-6e5f06480b33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019fd31e-d92b-7a4f-916b-c9c1322a39f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019f13e5-2499-70a4-97bf-abff9d2490ed" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019fd31e-d92b-7a4f-916b-c9c1322a39f4" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.seadrill.com/role/CommitmentandcontingenciesNarrativeDetails" xlink:type="simple" xlink:href="sdrl-20260630.xsd#CommitmentandcontingenciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.seadrill.com/role/CommitmentandcontingenciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019f13e5-2499-7392-bc6c-7cef3330fe02" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:to="loc_srt_CounterpartyNameAxis_019f13e5-2499-7392-bc6c-7cef3330fe02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f13e5-2499-7392-bc6c-7cef3330fe02_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019f13e5-2499-7392-bc6c-7cef3330fe02" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f13e5-2499-7392-bc6c-7cef3330fe02_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f13e5-2499-7db1-aa20-ceedf32393e3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019f13e5-2499-7392-bc6c-7cef3330fe02" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f13e5-2499-7db1-aa20-ceedf32393e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SFLHerculesLtdMember_019f13e5-2499-7bfd-9e34-71d4c6a02d34" xlink:href="sdrl-20260630.xsd#sdrl_SFLHerculesLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f13e5-2499-7db1-aa20-ceedf32393e3" xlink:to="loc_sdrl_SFLHerculesLtdMember_019f13e5-2499-7bfd-9e34-71d4c6a02d34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SonadrillFeesClaimantMember_019f13e5-2499-7adc-82ef-36eba21354e0" xlink:href="sdrl-20260630.xsd#sdrl_SonadrillFeesClaimantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019f13e5-2499-7db1-aa20-ceedf32393e3" xlink:to="loc_sdrl_SonadrillFeesClaimantMember_019f13e5-2499-7adc-82ef-36eba21354e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7ad7-8e2a-6d0ecbf5620d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:to="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7ad7-8e2a-6d0ecbf5620d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7ad7-8e2a-6d0ecbf5620d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7ad7-8e2a-6d0ecbf5620d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7ad7-8e2a-6d0ecbf5620d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7012-9f71-664f3cbad22f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f13e5-2499-7ad7-8e2a-6d0ecbf5620d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7012-9f71-664f3cbad22f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_FiveYearFirstLienRevolvingCreditFacilityMember_019f13e5-2499-7415-a2dd-47bc88d12c53" xlink:href="sdrl-20260630.xsd#sdrl_FiveYearFirstLienRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7012-9f71-664f3cbad22f" xlink:to="loc_sdrl_FiveYearFirstLienRevolvingCreditFacilityMember_019f13e5-2499-7415-a2dd-47bc88d12c53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_BilateralFacilityMember_019f13e5-2499-7513-92e6-c3ceeae71ac5" xlink:href="sdrl-20260630.xsd#sdrl_BilateralFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f13e5-2499-7012-9f71-664f3cbad22f" xlink:to="loc_sdrl_BilateralFacilityMember_019f13e5-2499-7513-92e6-c3ceeae71ac5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019f13e5-2499-7bc8-bfcb-09ee62c7c2ac" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:to="loc_srt_StatementGeographicalAxis_019f13e5-2499-7bc8-bfcb-09ee62c7c2ac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f13e5-2499-7bc8-bfcb-09ee62c7c2ac_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019f13e5-2499-7bc8-bfcb-09ee62c7c2ac" xlink:to="loc_srt_SegmentGeographicalDomain_019f13e5-2499-7bc8-bfcb-09ee62c7c2ac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019f13e5-2499-71dd-9059-ce44bed684e3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019f13e5-2499-7bc8-bfcb-09ee62c7c2ac" xlink:to="loc_srt_SegmentGeographicalDomain_019f13e5-2499-71dd-9059-ce44bed684e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_NG_019f13e5-2499-78c3-aea2-c0d9f24f1c8f" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_NG"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019f13e5-2499-71dd-9059-ce44bed684e3" xlink:to="loc_country_NG_019f13e5-2499-78c3-aea2-c0d9f24f1c8f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_019f13e5-2499-7048-95c8-6b151af2f416" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:to="loc_srt_LitigationCaseAxis_019f13e5-2499-7048-95c8-6b151af2f416" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019f13e5-2499-7048-95c8-6b151af2f416_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_019f13e5-2499-7048-95c8-6b151af2f416" xlink:to="loc_srt_LitigationCaseTypeDomain_019f13e5-2499-7048-95c8-6b151af2f416_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019f13e5-2499-704c-af7b-9a7ce311912e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_019f13e5-2499-7048-95c8-6b151af2f416" xlink:to="loc_srt_LitigationCaseTypeDomain_019f13e5-2499-704c-af7b-9a7ce311912e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SeteBrazilClaimMember_019f13e5-2499-78e4-a26c-0e80c6abb7fe" xlink:href="sdrl-20260630.xsd#sdrl_SeteBrazilClaimMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019f13e5-2499-704c-af7b-9a7ce311912e" xlink:to="loc_sdrl_SeteBrazilClaimMember_019f13e5-2499-78e4-a26c-0e80c6abb7fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019f13e5-2499-7791-aa81-2290d826b3e3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:to="loc_dei_LegalEntityAxis_019f13e5-2499-7791-aa81-2290d826b3e3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f13e5-2499-7791-aa81-2290d826b3e3_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019f13e5-2499-7791-aa81-2290d826b3e3" xlink:to="loc_dei_EntityDomain_019f13e5-2499-7791-aa81-2290d826b3e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f13e5-2499-7c23-99e4-78d9e558b7d4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019f13e5-2499-7791-aa81-2290d826b3e3" xlink:to="loc_dei_EntityDomain_019f13e5-2499-7c23-99e4-78d9e558b7d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SeadrillServicosDePetroleoLtdaSeadrillBrazilMember_019f13e5-2499-75c5-9dc4-6cfa729e27db" xlink:href="sdrl-20260630.xsd#sdrl_SeadrillServicosDePetroleoLtdaSeadrillBrazilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019f13e5-2499-7c23-99e4-78d9e558b7d4" xlink:to="loc_sdrl_SeadrillServicosDePetroleoLtdaSeadrillBrazilMember_019f13e5-2499-75c5-9dc4-6cfa729e27db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodAxis_019f13e5-2499-7495-808c-9ba40adf8417" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:to="loc_us-gaap_TaxPeriodAxis_019f13e5-2499-7495-808c-9ba40adf8417" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodDomain_019f13e5-2499-7495-808c-9ba40adf8417_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxPeriodAxis_019f13e5-2499-7495-808c-9ba40adf8417" xlink:to="loc_us-gaap_TaxPeriodDomain_019f13e5-2499-7495-808c-9ba40adf8417_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodDomain_019f13e5-2499-71af-b1c5-888a1aab40f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxPeriodAxis_019f13e5-2499-7495-808c-9ba40adf8417" xlink:to="loc_us-gaap_TaxPeriodDomain_019f13e5-2499-71af-b1c5-888a1aab40f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxYear2009Member_019f13e5-2499-765b-a9e3-921935fee388" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxYear2009Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_019f13e5-2499-71af-b1c5-888a1aab40f8" xlink:to="loc_us-gaap_TaxYear2009Member_019f13e5-2499-765b-a9e3-921935fee388" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_TaxYear200820122016And2017Member_019f13e5-2499-7c18-979c-7ff343affa87" xlink:href="sdrl-20260630.xsd#sdrl_TaxYear200820122016And2017Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_019f13e5-2499-71af-b1c5-888a1aab40f8" xlink:to="loc_sdrl_TaxYear200820122016And2017Member_019f13e5-2499-7c18-979c-7ff343affa87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019f13e5-2499-7911-8e7f-f0ec83a58d33" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019f13e5-2499-7911-8e7f-f0ec83a58d33" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_019f13e5-2499-7911-8e7f-f0ec83a58d33_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019f13e5-2499-7911-8e7f-f0ec83a58d33" xlink:to="loc_us-gaap_LossContingencyNatureDomain_019f13e5-2499-7911-8e7f-f0ec83a58d33_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_019f13e5-2499-776b-8d2a-d202ec98c348" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019f13e5-2499-7911-8e7f-f0ec83a58d33" xlink:to="loc_us-gaap_LossContingencyNatureDomain_019f13e5-2499-776b-8d2a-d202ec98c348" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SuretyBondMember_019f13e5-2499-70be-8dcb-beebacaf7286" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SuretyBondMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_019f13e5-2499-776b-8d2a-d202ec98c348" xlink:to="loc_us-gaap_SuretyBondMember_019f13e5-2499-70be-8dcb-beebacaf7286" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019f13e5-2499-7a08-9f00-5b39cdaa44e9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019f13e5-2499-7a08-9f00-5b39cdaa44e9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019f13e5-2499-7a08-9f00-5b39cdaa44e9_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019f13e5-2499-7a08-9f00-5b39cdaa44e9" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019f13e5-2499-7a08-9f00-5b39cdaa44e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019f13e5-2499-76a4-a1f1-8d696c7fe8bf" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019f13e5-2499-7a08-9f00-5b39cdaa44e9" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019f13e5-2499-76a4-a1f1-8d696c7fe8bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_SonadrillMember_019f13e5-2499-77ba-82b6-d8dec8d6b2ed" xlink:href="sdrl-20260630.xsd#sdrl_SonadrillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019f13e5-2499-76a4-a1f1-8d696c7fe8bf" xlink:to="loc_sdrl_SonadrillMember_019f13e5-2499-77ba-82b6-d8dec8d6b2ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_019f13e5-2499-7f26-801d-06d4cc93f2d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsByNatureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_019f13e5-2499-735d-b29b-3aa7bccedae2" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_019f13e5-2499-7f26-801d-06d4cc93f2d9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_019f13e5-2499-7f26-801d-06d4cc93f2d9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_019f13e5-2499-7f26-801d-06d4cc93f2d9" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_019f13e5-2499-7f26-801d-06d4cc93f2d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_019f13e5-2499-7061-b382-a2cd7e807526" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_019f13e5-2499-7f26-801d-06d4cc93f2d9" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_019f13e5-2499-7061-b382-a2cd7e807526" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceGuaranteeMember_019f13e5-2499-70e5-a998-43db8b2342b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PerformanceGuaranteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019f13e5-2499-7061-b382-a2cd7e807526" xlink:to="loc_us-gaap_PerformanceGuaranteeMember_019f13e5-2499-70e5-a998-43db8b2342b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_019f13e5-2499-75d7-a321-2127425249f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_019f13e5-2499-75d7-a321-2127425249f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationSettlementExpense_019f13e5-2499-7a7b-9163-271843f39a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LitigationSettlementExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_us-gaap_LitigationSettlementExpense_019f13e5-2499-7a7b-9163-271843f39a4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_019f13e5-2499-73c6-bdcb-67c4d7164547" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_019f13e5-2499-73c6-bdcb-67c4d7164547" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyDamagesSoughtValue_019f13e5-2499-7c0a-9422-435ca99905a6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyDamagesSoughtValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_us-gaap_LossContingencyDamagesSoughtValue_019f13e5-2499-7c0a-9422-435ca99905a6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyDamagesPaidValue_019f13e5-2499-71d8-bbd7-944169e337b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyDamagesPaidValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_us-gaap_LossContingencyDamagesPaidValue_019f13e5-2499-71d8-bbd7-944169e337b4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_ContractValueDeductionPercentage_019f13e5-2499-7cff-80c5-d3c5a3351a4e" xlink:href="sdrl-20260630.xsd#sdrl_ContractValueDeductionPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_sdrl_ContractValueDeductionPercentage_019f13e5-2499-7cff-80c5-d3c5a3351a4e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_NumberOfRigs_019f13e5-2499-7de4-9966-c123fde4e90e" xlink:href="sdrl-20260630.xsd#sdrl_NumberOfRigs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_sdrl_NumberOfRigs_019f13e5-2499-7de4-9966-c123fde4e90e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_ContractValueDeductionValue_019f13e5-2499-72ae-b514-fb692a41fc05" xlink:href="sdrl-20260630.xsd#sdrl_ContractValueDeductionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_sdrl_ContractValueDeductionValue_019f13e5-2499-72ae-b514-fb692a41fc05" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_NumberOfDrillships_019f13e5-2499-7f6d-ae1e-e4a08ed3bf13" xlink:href="sdrl-20260630.xsd#sdrl_NumberOfDrillships"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_sdrl_NumberOfDrillships_019f13e5-2499-7f6d-ae1e-e4a08ed3bf13" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_LossContingencyDelayPenaltyPercentage_019f13e5-2499-7920-b0bb-1ffd2839a8d0" xlink:href="sdrl-20260630.xsd#sdrl_LossContingencyDelayPenaltyPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_sdrl_LossContingencyDelayPenaltyPercentage_019f13e5-2499-7920-b0bb-1ffd2839a8d0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_NumberOfActiveContracts_019f13e5-2499-7b32-aaf9-c1bab406959c" xlink:href="sdrl-20260630.xsd#sdrl_NumberOfActiveContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_sdrl_NumberOfActiveContracts_019f13e5-2499-7b32-aaf9-c1bab406959c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_sdrl_NumberOfFutureContracts_019f13e5-2499-75b1-b2f4-8b8428572bdb" xlink:href="sdrl-20260630.xsd#sdrl_NumberOfFutureContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_019f13e5-2499-7528-9f10-712d719bbad2" xlink:to="loc_sdrl_NumberOfFutureContracts_019f13e5-2499-75b1-b2f4-8b8428572bdb" xlink:type="arc" order="11"/>
  </link:definitionLink>
</link:linkbase>
