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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:9db7544a-43dc-48f6-9925-d4e6f34cdfdd,g:f21f8c91-50b3-47a1-8a51-941265811ef2-->
<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.signetjewelers.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="simple" xlink:href="sig-20211030.xsd#CondensedConsolidatedBalanceSheetsUnauditedParenthetical"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical" xlink:type="extended" id="i1fa45eb15e2048ffbe9e3fccadc9fd8b_CondensedConsolidatedBalanceSheetsUnauditedParenthetical">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_b809d227-bd72-4c70-bbed-e73fcb5bbae6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_f3b997a8-045b-49f8-a795-e1dcf9f95473" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b809d227-bd72-4c70-bbed-e73fcb5bbae6" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_f3b997a8-045b-49f8-a795-e1dcf9f95473" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityParOrStatedValuePerShare_377d2831-dd4d-4093-b20a-2e73ef87cf3f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b809d227-bd72-4c70-bbed-e73fcb5bbae6" xlink:to="loc_us-gaap_TemporaryEquityParOrStatedValuePerShare_377d2831-dd4d-4093-b20a-2e73ef87cf3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesAuthorized_240c79e7-4f34-4094-af04-677d62ebc2ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquitySharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b809d227-bd72-4c70-bbed-e73fcb5bbae6" xlink:to="loc_us-gaap_TemporaryEquitySharesAuthorized_240c79e7-4f34-4094-af04-677d62ebc2ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_3a78c349-aef2-4b2d-8f5f-f3359e847ad5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b809d227-bd72-4c70-bbed-e73fcb5bbae6" xlink:to="loc_us-gaap_TemporaryEquitySharesOutstanding_3a78c349-aef2-4b2d-8f5f-f3359e847ad5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_151e698e-d22e-49cb-af08-adb06c0de0c7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b809d227-bd72-4c70-bbed-e73fcb5bbae6" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_151e698e-d22e-49cb-af08-adb06c0de0c7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_a81cde98-c2c6-4b30-acf4-bfa24d8d2e4d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b809d227-bd72-4c70-bbed-e73fcb5bbae6" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_a81cde98-c2c6-4b30-acf4-bfa24d8d2e4d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_71db8cc5-0122-4ee2-9be1-24e03ffdd3b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b809d227-bd72-4c70-bbed-e73fcb5bbae6" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_71db8cc5-0122-4ee2-9be1-24e03ffdd3b3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockShares_dcdf0c61-64c0-4185-aea4-7f55119fdd16" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_b809d227-bd72-4c70-bbed-e73fcb5bbae6" xlink:to="loc_us-gaap_TreasuryStockShares_dcdf0c61-64c0-4185-aea4-7f55119fdd16" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_fe76be3e-8dc2-4f7c-b475-42d5aa532aa3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_b809d227-bd72-4c70-bbed-e73fcb5bbae6" xlink:to="loc_us-gaap_StatementTable_fe76be3e-8dc2-4f7c-b475-42d5aa532aa3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_6ea6ca68-61c7-4b9f-9ae5-2cb48b2c1f9e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_fe76be3e-8dc2-4f7c-b475-42d5aa532aa3" xlink:to="loc_us-gaap_StatementClassOfStockAxis_6ea6ca68-61c7-4b9f-9ae5-2cb48b2c1f9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_6ea6ca68-61c7-4b9f-9ae5-2cb48b2c1f9e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6ea6ca68-61c7-4b9f-9ae5-2cb48b2c1f9e" xlink:to="loc_us-gaap_ClassOfStockDomain_6ea6ca68-61c7-4b9f-9ae5-2cb48b2c1f9e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_aeec7985-97ba-4821-bd92-69d980a69a50" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6ea6ca68-61c7-4b9f-9ae5-2cb48b2c1f9e" xlink:to="loc_us-gaap_ClassOfStockDomain_aeec7985-97ba-4821-bd92-69d980a69a50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_e7bc0a90-21dd-41f8-8cdf-248b9f7b0145" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_aeec7985-97ba-4821-bd92-69d980a69a50" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_e7bc0a90-21dd-41f8-8cdf-248b9f7b0145" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/CondensedConsolidatedStatementsOfShareholdersEquityUnaudited" xlink:type="simple" xlink:href="sig-20211030.xsd#CondensedConsolidatedStatementsOfShareholdersEquityUnaudited"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/CondensedConsolidatedStatementsOfShareholdersEquityUnaudited" xlink:type="extended" id="ib599f0d08ce14b68a41aaf7c89bd9cae_CondensedConsolidatedStatementsOfShareholdersEquityUnaudited">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_789437d3-909c-4633-8958-4c0b758a8063" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cb9b7856-7091-4b28-af40-c19f8b40138e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_789437d3-909c-4633-8958-4c0b758a8063" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cb9b7856-7091-4b28-af40-c19f8b40138e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_00ca4d30-9272-4bfe-8273-7665d345e80b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cb9b7856-7091-4b28-af40-c19f8b40138e" xlink:to="loc_us-gaap_StockholdersEquity_00ca4d30-9272-4bfe-8273-7665d345e80b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_c1800889-74e5-40fb-ab52-1cae97016caa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cb9b7856-7091-4b28-af40-c19f8b40138e" xlink:to="loc_us-gaap_NetIncomeLoss_c1800889-74e5-40fb-ab52-1cae97016caa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8abf2464-07b3-4cff-a175-4d6f01095ee7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cb9b7856-7091-4b28-af40-c19f8b40138e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_8abf2464-07b3-4cff-a175-4d6f01095ee7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_ae1cb82e-66ca-4e66-b821-63aca8db4671" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cb9b7856-7091-4b28-af40-c19f8b40138e" xlink:to="loc_us-gaap_DividendsCommonStock_ae1cb82e-66ca-4e66-b821-63aca8db4671" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPreferredStockCash_87257fd3-6c9d-4594-8367-50345cb0650f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsPreferredStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cb9b7856-7091-4b28-af40-c19f8b40138e" xlink:to="loc_us-gaap_DividendsPreferredStockCash_87257fd3-6c9d-4594-8367-50345cb0650f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_3d2ac794-70f2-4a28-a00d-0d882e3489b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cb9b7856-7091-4b28-af40-c19f8b40138e" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_3d2ac794-70f2-4a28-a00d-0d882e3489b6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_fb2dc86d-8332-452c-ade5-18921a3c214a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cb9b7856-7091-4b28-af40-c19f8b40138e" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_fb2dc86d-8332-452c-ade5-18921a3c214a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_eff40d79-6f31-4196-85c2-5e01c3754fa0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_cb9b7856-7091-4b28-af40-c19f8b40138e" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_eff40d79-6f31-4196-85c2-5e01c3754fa0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_5fc919ca-5aff-4b50-bce0-ee0e2c6dd497" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_981fc46f-4492-4679-a276-1739938fad29" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_789437d3-909c-4633-8958-4c0b758a8063" xlink:to="loc_us-gaap_StatementTable_981fc46f-4492-4679-a276-1739938fad29" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_e2e581e3-430c-46f9-bd20-9cc562fa28d1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_981fc46f-4492-4679-a276-1739938fad29" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_e2e581e3-430c-46f9-bd20-9cc562fa28d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e2e581e3-430c-46f9-bd20-9cc562fa28d1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e2e581e3-430c-46f9-bd20-9cc562fa28d1" xlink:to="loc_us-gaap_EquityComponentDomain_e2e581e3-430c-46f9-bd20-9cc562fa28d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_73c8c1cc-ed54-4f32-a66b-56b642f39244" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_e2e581e3-430c-46f9-bd20-9cc562fa28d1" xlink:to="loc_us-gaap_EquityComponentDomain_73c8c1cc-ed54-4f32-a66b-56b642f39244" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_81e6c4a5-f624-4a15-81d9-7e4100944310" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_73c8c1cc-ed54-4f32-a66b-56b642f39244" xlink:to="loc_us-gaap_CommonStockMember_81e6c4a5-f624-4a15-81d9-7e4100944310" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_a8d211de-0053-41c6-86c8-a3f87554b5d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_73c8c1cc-ed54-4f32-a66b-56b642f39244" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_a8d211de-0053-41c6-86c8-a3f87554b5d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAdditionalCapitalMember_531a77af-1d32-49dc-ab18-c806e7bb4b97" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAdditionalCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_73c8c1cc-ed54-4f32-a66b-56b642f39244" xlink:to="loc_us-gaap_OtherAdditionalCapitalMember_531a77af-1d32-49dc-ab18-c806e7bb4b97" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_2e82ee0d-0b8d-4533-aff8-7ecd5966231a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_73c8c1cc-ed54-4f32-a66b-56b642f39244" xlink:to="loc_us-gaap_TreasuryStockMember_2e82ee0d-0b8d-4533-aff8-7ecd5966231a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_711ec771-f6dd-4231-a3c3-ac93ccfc0fb4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_73c8c1cc-ed54-4f32-a66b-56b642f39244" xlink:to="loc_us-gaap_RetainedEarningsMember_711ec771-f6dd-4231-a3c3-ac93ccfc0fb4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_be14e40f-5a09-4e29-b1de-4168b9ea6ff7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_73c8c1cc-ed54-4f32-a66b-56b642f39244" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_be14e40f-5a09-4e29-b1de-4168b9ea6ff7" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/OrganizationandprincipalaccountingpoliciesAdditionalinformationDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#OrganizationandprincipalaccountingpoliciesAdditionalinformationDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/OrganizationandprincipalaccountingpoliciesAdditionalinformationDetails" xlink:type="extended" id="i0633589bbcc34a97b97ed42bd7a50c27_OrganizationandprincipalaccountingpoliciesAdditionalinformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_60035f29-2bae-4e02-90d0-8a862ddd262b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_a44bacaa-28b2-4cb3-a1c2-b1a344a027b7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_60035f29-2bae-4e02-90d0-8a862ddd262b" xlink:to="loc_us-gaap_NumberOfReportableSegments_a44bacaa-28b2-4cb3-a1c2-b1a344a027b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SeasonalRevenuesFourthQuarterSalesPercent_4baae16f-e75c-4634-a10a-0c12f4df372c" xlink:href="sig-20211030.xsd#sig_SeasonalRevenuesFourthQuarterSalesPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_60035f29-2bae-4e02-90d0-8a862ddd262b" xlink:to="loc_sig_SeasonalRevenuesFourthQuarterSalesPercent_4baae16f-e75c-4634-a10a-0c12f4df372c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_8b5bc3e6-19f0-441f-ae3f-2debb3688dee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_60035f29-2bae-4e02-90d0-8a862ddd262b" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_8b5bc3e6-19f0-441f-ae3f-2debb3688dee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_775c8680-b8d6-47e2-a373-63b445ff4c04" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_60035f29-2bae-4e02-90d0-8a862ddd262b" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_775c8680-b8d6-47e2-a373-63b445ff4c04" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_f27db10e-fa8b-45c4-afce-6ea211f8e56f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_60035f29-2bae-4e02-90d0-8a862ddd262b" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_f27db10e-fa8b-45c4-afce-6ea211f8e56f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d262bb9b-ad91-4c3e-812b-fce3451938b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_60035f29-2bae-4e02-90d0-8a862ddd262b" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d262bb9b-ad91-4c3e-812b-fce3451938b3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_fc6ef55e-f07c-4142-a995-978db5881a15" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d262bb9b-ad91-4c3e-812b-fce3451938b3" xlink:to="loc_srt_RangeAxis_fc6ef55e-f07c-4142-a995-978db5881a15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_fc6ef55e-f07c-4142-a995-978db5881a15_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_fc6ef55e-f07c-4142-a995-978db5881a15" xlink:to="loc_srt_RangeMember_fc6ef55e-f07c-4142-a995-978db5881a15_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_56b5d452-0ad0-4654-8121-194bf9c8d0b1" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_fc6ef55e-f07c-4142-a995-978db5881a15" xlink:to="loc_srt_RangeMember_56b5d452-0ad0-4654-8121-194bf9c8d0b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_cb668f96-d9db-4fd3-a974-a304da47519d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_56b5d452-0ad0-4654-8121-194bf9c8d0b1" xlink:to="loc_srt_MinimumMember_cb668f96-d9db-4fd3-a974-a304da47519d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_33994116-0446-4e09-b411-a6f3daf744bd" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_56b5d452-0ad0-4654-8121-194bf9c8d0b1" xlink:to="loc_srt_MaximumMember_33994116-0446-4e09-b411-a6f3daf744bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_fb0c9d5d-051a-43ea-be2b-94118d7852b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d262bb9b-ad91-4c3e-812b-fce3451938b3" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_fb0c9d5d-051a-43ea-be2b-94118d7852b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_fb0c9d5d-051a-43ea-be2b-94118d7852b3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_fb0c9d5d-051a-43ea-be2b-94118d7852b3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_fb0c9d5d-051a-43ea-be2b-94118d7852b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2f2d4027-8997-4597-a62a-0da79260dbcc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_fb0c9d5d-051a-43ea-be2b-94118d7852b3" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2f2d4027-8997-4597-a62a-0da79260dbcc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_RocksboxMember_a98135d7-cbf5-4d26-bc6e-6bbbb038f8f4" xlink:href="sig-20211030.xsd#sig_RocksboxMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2f2d4027-8997-4597-a62a-0da79260dbcc" xlink:to="loc_sig_RocksboxMember_a98135d7-cbf5-4d26-bc6e-6bbbb038f8f4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DiamondsDirectUSAIncMember_567a95d5-b1a6-458f-a49a-848da8a9a6f5" xlink:href="sig-20211030.xsd#sig_DiamondsDirectUSAIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_2f2d4027-8997-4597-a62a-0da79260dbcc" xlink:to="loc_sig_DiamondsDirectUSAIncMember_567a95d5-b1a6-458f-a49a-848da8a9a6f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_a54fe4ef-b7b2-4071-80f1-5a82d5f873cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d262bb9b-ad91-4c3e-812b-fce3451938b3" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_a54fe4ef-b7b2-4071-80f1-5a82d5f873cf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_a54fe4ef-b7b2-4071-80f1-5a82d5f873cf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_a54fe4ef-b7b2-4071-80f1-5a82d5f873cf" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_a54fe4ef-b7b2-4071-80f1-5a82d5f873cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_e7028a9c-204f-4fba-a43a-bfc185444d81" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_a54fe4ef-b7b2-4071-80f1-5a82d5f873cf" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_e7028a9c-204f-4fba-a43a-bfc185444d81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_202c6dac-6b13-46f0-a199-0ed0f510c9f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_e7028a9c-204f-4fba-a43a-bfc185444d81" xlink:to="loc_us-gaap_SubsequentEventMember_202c6dac-6b13-46f0-a199-0ed0f510c9f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_3224da7c-62f9-499f-a74f-a6cf005d1b26" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d262bb9b-ad91-4c3e-812b-fce3451938b3" xlink:to="loc_srt_ConsolidationItemsAxis_3224da7c-62f9-499f-a74f-a6cf005d1b26" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_3224da7c-62f9-499f-a74f-a6cf005d1b26_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_3224da7c-62f9-499f-a74f-a6cf005d1b26" xlink:to="loc_srt_ConsolidationItemsDomain_3224da7c-62f9-499f-a74f-a6cf005d1b26_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_e8ec9752-38ce-453e-afb1-f715ec96f980" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_3224da7c-62f9-499f-a74f-a6cf005d1b26" xlink:to="loc_srt_ConsolidationItemsDomain_e8ec9752-38ce-453e-afb1-f715ec96f980" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_d367b1a5-65f3-452a-9623-2c50d9e3bea8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_e8ec9752-38ce-453e-afb1-f715ec96f980" xlink:to="loc_us-gaap_OperatingSegmentsMember_d367b1a5-65f3-452a-9623-2c50d9e3bea8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_082dc86e-5967-40e0-9d43-8e8e64543a05" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_d262bb9b-ad91-4c3e-812b-fce3451938b3" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_082dc86e-5967-40e0-9d43-8e8e64543a05" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_082dc86e-5967-40e0-9d43-8e8e64543a05_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_082dc86e-5967-40e0-9d43-8e8e64543a05" xlink:to="loc_us-gaap_SegmentDomain_082dc86e-5967-40e0-9d43-8e8e64543a05_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_86765cf2-2c62-4248-99a5-c5df8677f97c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_082dc86e-5967-40e0-9d43-8e8e64543a05" xlink:to="loc_us-gaap_SegmentDomain_86765cf2-2c62-4248-99a5-c5df8677f97c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_NorthAmericaSegmentMember_16629676-8e60-4328-9e19-058d285ec5f8" xlink:href="sig-20211030.xsd#sig_NorthAmericaSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_86765cf2-2c62-4248-99a5-c5df8677f97c" xlink:to="loc_sig_NorthAmericaSegmentMember_16629676-8e60-4328-9e19-058d285ec5f8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/RevenuerecognitionDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#RevenuerecognitionDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/RevenuerecognitionDisaggregationofRevenueDetails" xlink:type="extended" id="i66409e36c03946ce9e78aebc8a7e450a_RevenuerecognitionDisaggregationofRevenueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_ab2b37b5-3ccf-43cc-a61d-30c185ea34e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9a2fe6a9-e009-4696-9396-a9179f62352a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_ab2b37b5-3ccf-43cc-a61d-30c185ea34e8" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_9a2fe6a9-e009-4696-9396-a9179f62352a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_9a72bcfb-1837-4787-a81f-f8dc07d7d291" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_ab2b37b5-3ccf-43cc-a61d-30c185ea34e8" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_9a72bcfb-1837-4787-a81f-f8dc07d7d291" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_e926fbfc-e279-41c1-920d-59348e7b12ef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_9a72bcfb-1837-4787-a81f-f8dc07d7d291" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_e926fbfc-e279-41c1-920d-59348e7b12ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e926fbfc-e279-41c1-920d-59348e7b12ef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e926fbfc-e279-41c1-920d-59348e7b12ef" xlink:to="loc_us-gaap_SegmentDomain_e926fbfc-e279-41c1-920d-59348e7b12ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_56bb02d4-98cf-4499-8a9a-4af3fb7a7271" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e926fbfc-e279-41c1-920d-59348e7b12ef" xlink:to="loc_us-gaap_SegmentDomain_56bb02d4-98cf-4499-8a9a-4af3fb7a7271" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_NorthAmericaSegmentMember_0dd89602-fec9-43c7-af3a-f36e4e111124" xlink:href="sig-20211030.xsd#sig_NorthAmericaSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_56bb02d4-98cf-4499-8a9a-4af3fb7a7271" xlink:to="loc_sig_NorthAmericaSegmentMember_0dd89602-fec9-43c7-af3a-f36e4e111124" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_InternationalMember_abd1d124-62c7-448b-be05-154dffa0d39b" xlink:href="sig-20211030.xsd#sig_InternationalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_56bb02d4-98cf-4499-8a9a-4af3fb7a7271" xlink:to="loc_sig_InternationalMember_abd1d124-62c7-448b-be05-154dffa0d39b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_d8c3d863-b0f9-453a-93b4-06f35b7ce6e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_56bb02d4-98cf-4499-8a9a-4af3fb7a7271" xlink:to="loc_us-gaap_AllOtherSegmentsMember_d8c3d863-b0f9-453a-93b4-06f35b7ce6e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelAxis_a5f2d827-5c95-4e4b-b6cd-bc1726a5699d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_9a72bcfb-1837-4787-a81f-f8dc07d7d291" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelAxis_a5f2d827-5c95-4e4b-b6cd-bc1726a5699d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_a5f2d827-5c95-4e4b-b6cd-bc1726a5699d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_a5f2d827-5c95-4e4b-b6cd-bc1726a5699d" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_a5f2d827-5c95-4e4b-b6cd-bc1726a5699d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_536b5dd7-eb9f-471b-89b8-dcf3ce4a380b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_a5f2d827-5c95-4e4b-b6cd-bc1726a5699d" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_536b5dd7-eb9f-471b-89b8-dcf3ce4a380b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesChannelDirectlyToConsumerMember_0decf950-e503-4fdd-8a7d-5a6b89aa11a6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesChannelDirectlyToConsumerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_536b5dd7-eb9f-471b-89b8-dcf3ce4a380b" xlink:to="loc_us-gaap_SalesChannelDirectlyToConsumerMember_0decf950-e503-4fdd-8a7d-5a6b89aa11a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_KayMember_b4e472ad-c21c-4e96-980f-abb0c001efff" xlink:href="sig-20211030.xsd#sig_KayMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesChannelDirectlyToConsumerMember_0decf950-e503-4fdd-8a7d-5a6b89aa11a6" xlink:to="loc_sig_KayMember_b4e472ad-c21c-4e96-980f-abb0c001efff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ZaleJewelryMember_1730b4d2-9ff4-4f8b-b6d2-5fafc813ace1" xlink:href="sig-20211030.xsd#sig_ZaleJewelryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesChannelDirectlyToConsumerMember_0decf950-e503-4fdd-8a7d-5a6b89aa11a6" xlink:to="loc_sig_ZaleJewelryMember_1730b4d2-9ff4-4f8b-b6d2-5fafc813ace1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_JaredMember_d91b43c4-10be-49cb-972a-de79418230e6" xlink:href="sig-20211030.xsd#sig_JaredMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesChannelDirectlyToConsumerMember_0decf950-e503-4fdd-8a7d-5a6b89aa11a6" xlink:to="loc_sig_JaredMember_d91b43c4-10be-49cb-972a-de79418230e6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_PiercingPagodaMember_2ef5bf61-6cf0-4279-8a38-73511ac0434d" xlink:href="sig-20211030.xsd#sig_PiercingPagodaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesChannelDirectlyToConsumerMember_0decf950-e503-4fdd-8a7d-5a6b89aa11a6" xlink:to="loc_sig_PiercingPagodaMember_2ef5bf61-6cf0-4279-8a38-73511ac0434d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_JamesAllenMember_baebd84d-90d9-4533-aba2-cbf65d33c013" xlink:href="sig-20211030.xsd#sig_JamesAllenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesChannelDirectlyToConsumerMember_0decf950-e503-4fdd-8a7d-5a6b89aa11a6" xlink:to="loc_sig_JamesAllenMember_baebd84d-90d9-4533-aba2-cbf65d33c013" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_PeoplesMember_a8a05eab-ae55-4c62-b6e8-d6c18a0fe42d" xlink:href="sig-20211030.xsd#sig_PeoplesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesChannelDirectlyToConsumerMember_0decf950-e503-4fdd-8a7d-5a6b89aa11a6" xlink:to="loc_sig_PeoplesMember_a8a05eab-ae55-4c62-b6e8-d6c18a0fe42d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_InternationalMember_8be380be-b297-41d0-a3d5-003767a4403f" xlink:href="sig-20211030.xsd#sig_InternationalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesChannelDirectlyToConsumerMember_0decf950-e503-4fdd-8a7d-5a6b89aa11a6" xlink:to="loc_sig_InternationalMember_8be380be-b297-41d0-a3d5-003767a4403f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_OtherBannerMember_d790c676-3608-4d35-8d35-2d6eeedf1657" xlink:href="sig-20211030.xsd#sig_OtherBannerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesChannelDirectlyToConsumerMember_0decf950-e503-4fdd-8a7d-5a6b89aa11a6" xlink:to="loc_sig_OtherBannerMember_d790c676-3608-4d35-8d35-2d6eeedf1657" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesChannelThroughIntermediaryMember_56df0349-f27d-4fa4-8890-f3d1c26316f8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SalesChannelThroughIntermediaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_536b5dd7-eb9f-471b-89b8-dcf3ce4a380b" xlink:to="loc_us-gaap_SalesChannelThroughIntermediaryMember_56df0349-f27d-4fa4-8890-f3d1c26316f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SalesChannelThroughOtherMember_6c4b013f-0cf2-4642-be3e-79ef06fc367e" xlink:href="sig-20211030.xsd#sig_SalesChannelThroughOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_536b5dd7-eb9f-471b-89b8-dcf3ce4a380b" xlink:to="loc_sig_SalesChannelThroughOtherMember_6c4b013f-0cf2-4642-be3e-79ef06fc367e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_9bd5f8c4-d191-4641-aec0-9119d11fe88d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_9a72bcfb-1837-4787-a81f-f8dc07d7d291" xlink:to="loc_srt_ProductOrServiceAxis_9bd5f8c4-d191-4641-aec0-9119d11fe88d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_9bd5f8c4-d191-4641-aec0-9119d11fe88d_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_9bd5f8c4-d191-4641-aec0-9119d11fe88d" xlink:to="loc_srt_ProductsAndServicesDomain_9bd5f8c4-d191-4641-aec0-9119d11fe88d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_74866f5c-c4b0-497c-b31b-40eb5fe344b9" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_9bd5f8c4-d191-4641-aec0-9119d11fe88d" xlink:to="loc_srt_ProductsAndServicesDomain_74866f5c-c4b0-497c-b31b-40eb5fe344b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_BridalMember_fbf3dfa3-d6ae-455a-b880-8f2d7ba5b570" xlink:href="sig-20211030.xsd#sig_BridalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_74866f5c-c4b0-497c-b31b-40eb5fe344b9" xlink:to="loc_sig_BridalMember_fbf3dfa3-d6ae-455a-b880-8f2d7ba5b570" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_FashionMember_a4f1b0dc-3fe3-4088-aa39-125ce7a8f50e" xlink:href="sig-20211030.xsd#sig_FashionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_74866f5c-c4b0-497c-b31b-40eb5fe344b9" xlink:to="loc_sig_FashionMember_a4f1b0dc-3fe3-4088-aa39-125ce7a8f50e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_WatchesMember_d4ce7dc7-73b6-4d26-94b4-478b0c0e0101" xlink:href="sig-20211030.xsd#sig_WatchesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_74866f5c-c4b0-497c-b31b-40eb5fe344b9" xlink:to="loc_sig_WatchesMember_d4ce7dc7-73b6-4d26-94b4-478b0c0e0101" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_OtherProductMember_85b47052-cf7b-4385-be06-7c0e8c56c2fb" xlink:href="sig-20211030.xsd#sig_OtherProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_74866f5c-c4b0-497c-b31b-40eb5fe344b9" xlink:to="loc_sig_OtherProductMember_85b47052-cf7b-4385-be06-7c0e8c56c2fb" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/RevenuerecognitionNarrativeDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#RevenuerecognitionNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/RevenuerecognitionNarrativeDetails" xlink:type="extended" id="i7d90fb3412db45759c79d7a917c11b1d_RevenuerecognitionNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_81b60eea-c2d4-42f0-b976-e6d5e94320ed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalizedContractCostAmortization_13ac8de6-ce39-4e54-90f9-448dde299635" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CapitalizedContractCostAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_81b60eea-c2d4-42f0-b976-e6d5e94320ed" xlink:to="loc_us-gaap_CapitalizedContractCostAmortization_13ac8de6-ce39-4e54-90f9-448dde299635" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_ec667f61-1c27-4d34-aadc-4a07c7689ac2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_81b60eea-c2d4-42f0-b976-e6d5e94320ed" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_ec667f61-1c27-4d34-aadc-4a07c7689ac2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_89cd5100-7d64-4a8a-b6f5-5d2796db734b" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_ec667f61-1c27-4d34-aadc-4a07c7689ac2" xlink:to="loc_srt_ProductOrServiceAxis_89cd5100-7d64-4a8a-b6f5-5d2796db734b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_89cd5100-7d64-4a8a-b6f5-5d2796db734b_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_89cd5100-7d64-4a8a-b6f5-5d2796db734b" xlink:to="loc_srt_ProductsAndServicesDomain_89cd5100-7d64-4a8a-b6f5-5d2796db734b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_3f4b5099-77fa-45cc-a649-d24628b4c0be" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_89cd5100-7d64-4a8a-b6f5-5d2796db734b" xlink:to="loc_srt_ProductsAndServicesDomain_3f4b5099-77fa-45cc-a649-d24628b4c0be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ExtendedServicePlansandLifetimeWarrantyAgreementsMember_405dc0ef-be00-4a6b-8c88-6c48f5767ce1" xlink:href="sig-20211030.xsd#sig_ExtendedServicePlansandLifetimeWarrantyAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3f4b5099-77fa-45cc-a649-d24628b4c0be" xlink:to="loc_sig_ExtendedServicePlansandLifetimeWarrantyAgreementsMember_405dc0ef-be00-4a6b-8c88-6c48f5767ce1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/RevenuerecognitionESPandVoucherPromotionsDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#RevenuerecognitionESPandVoucherPromotionsDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/RevenuerecognitionESPandVoucherPromotionsDetails" xlink:type="extended" id="id007194456184c1c9e518418a3886263_RevenuerecognitionESPandVoucherPromotionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_e265ea03-7f8e-4ef8-84f2-09538c2dadd7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_3d1cd67d-d64c-4a2f-b2de-a4486bd89de1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_e265ea03-7f8e-4ef8-84f2-09538c2dadd7" xlink:to="loc_us-gaap_ContractWithCustomerLiability_3d1cd67d-d64c-4a2f-b2de-a4486bd89de1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_bcd0d66e-8c14-41eb-97fc-77ef70492445" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_e265ea03-7f8e-4ef8-84f2-09538c2dadd7" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_bcd0d66e-8c14-41eb-97fc-77ef70492445" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_c6b5f9ea-baf0-4e9d-b71d-18d75dcdb54a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_e265ea03-7f8e-4ef8-84f2-09538c2dadd7" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_c6b5f9ea-baf0-4e9d-b71d-18d75dcdb54a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_2f3a8570-e97d-4ccc-8fa0-a36318c9977c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_e265ea03-7f8e-4ef8-84f2-09538c2dadd7" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_2f3a8570-e97d-4ccc-8fa0-a36318c9977c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_da38e72d-4c0f-4f3a-9291-5b4501b58af2" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_2f3a8570-e97d-4ccc-8fa0-a36318c9977c" xlink:to="loc_srt_ProductOrServiceAxis_da38e72d-4c0f-4f3a-9291-5b4501b58af2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_da38e72d-4c0f-4f3a-9291-5b4501b58af2_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_da38e72d-4c0f-4f3a-9291-5b4501b58af2" xlink:to="loc_srt_ProductsAndServicesDomain_da38e72d-4c0f-4f3a-9291-5b4501b58af2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_f2f50cc8-1386-4b65-b751-1ee1542bc654" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_da38e72d-4c0f-4f3a-9291-5b4501b58af2" xlink:to="loc_srt_ProductsAndServicesDomain_f2f50cc8-1386-4b65-b751-1ee1542bc654" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ExtendedServicePlanMember_ed4c1de7-81e2-4bbc-bfdd-fbd54a654a2f" xlink:href="sig-20211030.xsd#sig_ExtendedServicePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_f2f50cc8-1386-4b65-b751-1ee1542bc654" xlink:to="loc_sig_ExtendedServicePlanMember_ed4c1de7-81e2-4bbc-bfdd-fbd54a654a2f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_CustomerAndECommerceOrdersMember_665077a8-a6b9-4d73-9491-a58b4fbff606" xlink:href="sig-20211030.xsd#sig_CustomerAndECommerceOrdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_f2f50cc8-1386-4b65-b751-1ee1542bc654" xlink:to="loc_sig_CustomerAndECommerceOrdersMember_665077a8-a6b9-4d73-9491-a58b4fbff606" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/RevenuerecognitionESPDeferredRevenueRollforwardDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#RevenuerecognitionESPDeferredRevenueRollforwardDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/RevenuerecognitionESPDeferredRevenueRollforwardDetails" xlink:type="extended" id="i24adca6d72f34bb7a87bbc7c1a228d0e_RevenuerecognitionESPDeferredRevenueRollforwardDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueArrangementLineItems_207e2c04-fe66-45c4-92fb-1e238a2f7626" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredRevenueArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ChangeinContractwithCustomerLiabilityRollForward_570630c9-11cb-4046-b9dc-d8f6811a3590" xlink:href="sig-20211030.xsd#sig_ChangeinContractwithCustomerLiabilityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredRevenueArrangementLineItems_207e2c04-fe66-45c4-92fb-1e238a2f7626" xlink:to="loc_sig_ChangeinContractwithCustomerLiabilityRollForward_570630c9-11cb-4046-b9dc-d8f6811a3590" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_01d2ac58-9538-422b-85f5-3d0a370732a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sig_ChangeinContractwithCustomerLiabilityRollForward_570630c9-11cb-4046-b9dc-d8f6811a3590" xlink:to="loc_us-gaap_ContractWithCustomerLiability_01d2ac58-9538-422b-85f5-3d0a370732a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_03279f56-79e0-497b-9518-d3623bb0d434" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sig_ChangeinContractwithCustomerLiabilityRollForward_570630c9-11cb-4046-b9dc-d8f6811a3590" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_03279f56-79e0-497b-9518-d3623bb0d434" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_2eef88e7-a2ce-4534-a2fa-1be34868419c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sig_ChangeinContractwithCustomerLiabilityRollForward_570630c9-11cb-4046-b9dc-d8f6811a3590" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_2eef88e7-a2ce-4534-a2fa-1be34868419c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_6e0abf92-ebf6-48bc-8281-0c77eedc1a60" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DeferredRevenueArrangementTable_1e40ec6e-6cd3-45ab-971b-5043cfef6e63" xlink:href="sig-20211030.xsd#sig_DeferredRevenueArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredRevenueArrangementLineItems_207e2c04-fe66-45c4-92fb-1e238a2f7626" xlink:to="loc_sig_DeferredRevenueArrangementTable_1e40ec6e-6cd3-45ab-971b-5043cfef6e63" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_945a5ead-b1ea-483a-b958-64958c40a536" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_sig_DeferredRevenueArrangementTable_1e40ec6e-6cd3-45ab-971b-5043cfef6e63" xlink:to="loc_srt_ProductOrServiceAxis_945a5ead-b1ea-483a-b958-64958c40a536" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_945a5ead-b1ea-483a-b958-64958c40a536_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_945a5ead-b1ea-483a-b958-64958c40a536" xlink:to="loc_srt_ProductsAndServicesDomain_945a5ead-b1ea-483a-b958-64958c40a536_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5a152357-90eb-4632-be7e-1a59dd07288f" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_945a5ead-b1ea-483a-b958-64958c40a536" xlink:to="loc_srt_ProductsAndServicesDomain_5a152357-90eb-4632-be7e-1a59dd07288f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ExtendedServicePlanMember_e6f6b22a-5cea-4665-b0a3-e605b90a3556" xlink:href="sig-20211030.xsd#sig_ExtendedServicePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5a152357-90eb-4632-be7e-1a59dd07288f" xlink:to="loc_sig_ExtendedServicePlanMember_e6f6b22a-5cea-4665-b0a3-e605b90a3556" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ExtendedServicePlanandVoucherPromotionsMember_ca662a26-39a1-44e8-8d11-ad7fc32017b1" xlink:href="sig-20211030.xsd#sig_ExtendedServicePlanandVoucherPromotionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5a152357-90eb-4632-be7e-1a59dd07288f" xlink:to="loc_sig_ExtendedServicePlanandVoucherPromotionsMember_ca662a26-39a1-44e8-8d11-ad7fc32017b1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/SegmentinformationSummaryofActivitybySegmentDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#SegmentinformationSummaryofActivitybySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/SegmentinformationSummaryofActivitybySegmentDetails" xlink:type="extended" id="i9cc34ff693b64880946107713147d1f7_SegmentinformationSummaryofActivitybySegmentDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_a5689f91-a337-497d-ae3f-1caf5a5e13ee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_a5689f91-a337-497d-ae3f-1caf5a5e13ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_6c7ae945-e28d-4ee5-a2e1-718084798e1b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_OperatingIncomeLoss_6c7ae945-e28d-4ee5-a2e1-718084798e1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_d5ba9f03-95cc-4656-a5c1-82f5b6aaae5f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_InterestExpense_d5ba9f03-95cc-4656-a5c1-82f5b6aaae5f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_458b73e4-82d2-4859-b1ab-e771f6f47cf0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_458b73e4-82d2-4859-b1ab-e771f6f47cf0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c214f79c-4c42-49aa-8b75-c76f87771fba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c214f79c-4c42-49aa-8b75-c76f87771fba" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_d5800ab0-ac3c-49a8-9419-fc6bc91f4c87" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_d5800ab0-ac3c-49a8-9419-fc6bc91f4c87" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfNotesReceivable_86c63cb8-c992-4664-bb9a-835cd9368783" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnSaleOfNotesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_GainLossOnSaleOfNotesReceivable_86c63cb8-c992-4664-bb9a-835cd9368783" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_7a1c4c87-749b-497b-a378-f34dce0298fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_RestructuringCharges_7a1c4c87-749b-497b-a378-f34dce0298fc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_30525fce-df45-4366-8b75-f5eccb654248" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_AssetImpairmentCharges_30525fce-df45-4366-8b75-f5eccb654248" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWriteDown_7ea397f3-f4f3-4997-a35a-214ddfd992af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_InventoryWriteDown_7ea397f3-f4f3-4997-a35a-214ddfd992af" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeveranceCosts1_bdf7b85a-c4f9-4fd5-bffb-73c80b859891" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeveranceCosts1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_SeveranceCosts1_bdf7b85a-c4f9-4fd5-bffb-73c80b859891" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossRelatedToLitigationSettlement_aa86fc88-6246-4d7f-92ff-0e9156f32a0f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossRelatedToLitigationSettlement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_GainLossRelatedToLitigationSettlement_aa86fc88-6246-4d7f-92ff-0e9156f32a0f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_002624ca-2129-4806-8f57-af58fde61687" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_a915c891-2413-406f-b399-4d8ce5af8550" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_002624ca-2129-4806-8f57-af58fde61687" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_ce187e30-afd4-4d18-bbeb-ce74a88c859f" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_002624ca-2129-4806-8f57-af58fde61687" xlink:to="loc_srt_ConsolidationItemsAxis_ce187e30-afd4-4d18-bbeb-ce74a88c859f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_ce187e30-afd4-4d18-bbeb-ce74a88c859f_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_ce187e30-afd4-4d18-bbeb-ce74a88c859f" xlink:to="loc_srt_ConsolidationItemsDomain_ce187e30-afd4-4d18-bbeb-ce74a88c859f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_4c557d4f-3626-47ba-ae7b-45cd942d8878" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_ce187e30-afd4-4d18-bbeb-ce74a88c859f" xlink:to="loc_srt_ConsolidationItemsDomain_4c557d4f-3626-47ba-ae7b-45cd942d8878" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_0c878138-cf8c-4662-bbc8-b4bb2e3cb28c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_4c557d4f-3626-47ba-ae7b-45cd942d8878" xlink:to="loc_us-gaap_OperatingSegmentsMember_0c878138-cf8c-4662-bbc8-b4bb2e3cb28c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_cb0f6b2a-fe0b-45d7-8c67-2c3a3b4be592" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_4c557d4f-3626-47ba-ae7b-45cd942d8878" xlink:to="loc_us-gaap_CorporateNonSegmentMember_cb0f6b2a-fe0b-45d7-8c67-2c3a3b4be592" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_d4adc44c-e0d1-47e6-aa75-e272db7aa7e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_002624ca-2129-4806-8f57-af58fde61687" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_d4adc44c-e0d1-47e6-aa75-e272db7aa7e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_d4adc44c-e0d1-47e6-aa75-e272db7aa7e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_d4adc44c-e0d1-47e6-aa75-e272db7aa7e9" xlink:to="loc_us-gaap_SegmentDomain_d4adc44c-e0d1-47e6-aa75-e272db7aa7e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_be3fdbcb-c08e-43a0-9753-6b7aac134414" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_d4adc44c-e0d1-47e6-aa75-e272db7aa7e9" xlink:to="loc_us-gaap_SegmentDomain_be3fdbcb-c08e-43a0-9753-6b7aac134414" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_NorthAmericaSegmentMember_816e2f2a-ac23-4633-b90e-c631fff4ed60" xlink:href="sig-20211030.xsd#sig_NorthAmericaSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_be3fdbcb-c08e-43a0-9753-6b7aac134414" xlink:to="loc_sig_NorthAmericaSegmentMember_816e2f2a-ac23-4633-b90e-c631fff4ed60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_InternationalMember_4d0adc1d-6c13-4315-b37c-47eb7b85ab96" xlink:href="sig-20211030.xsd#sig_InternationalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_be3fdbcb-c08e-43a0-9753-6b7aac134414" xlink:to="loc_sig_InternationalMember_4d0adc1d-6c13-4315-b37c-47eb7b85ab96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_b89d33b8-328e-4c49-98dc-8cebdf9b7e80" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_be3fdbcb-c08e-43a0-9753-6b7aac134414" xlink:to="loc_us-gaap_AllOtherSegmentsMember_b89d33b8-328e-4c49-98dc-8cebdf9b7e80" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_a37fea6e-1df3-442d-81b0-02a0f0c69488" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_002624ca-2129-4806-8f57-af58fde61687" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_a37fea6e-1df3-442d-81b0-02a0f0c69488" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a37fea6e-1df3-442d-81b0-02a0f0c69488_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_a37fea6e-1df3-442d-81b0-02a0f0c69488" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_a37fea6e-1df3-442d-81b0-02a0f0c69488_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f11c004f-67b8-41d0-86ee-8e00fc5fae57" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_a37fea6e-1df3-442d-81b0-02a0f0c69488" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f11c004f-67b8-41d0-86ee-8e00fc5fae57" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DiamondsDirectUSAIncMember_d898c2c7-7ace-4fd8-944c-00cfe39a53a3" xlink:href="sig-20211030.xsd#sig_DiamondsDirectUSAIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_f11c004f-67b8-41d0-86ee-8e00fc5fae57" xlink:to="loc_sig_DiamondsDirectUSAIncMember_d898c2c7-7ace-4fd8-944c-00cfe39a53a3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/RestructuringplansNarrativeDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#RestructuringplansNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/RestructuringplansNarrativeDetails" xlink:type="extended" id="ied8ead1322234b82b0e2c803cfbb614f_RestructuringplansNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_e3cbd4b5-29a9-43df-b3eb-729a9ff635c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_RestructuringPlanLength_1d10423a-bbad-4abd-9858-62c5d1128504" xlink:href="sig-20211030.xsd#sig_RestructuringPlanLength"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e3cbd4b5-29a9-43df-b3eb-729a9ff635c6" xlink:to="loc_sig_RestructuringPlanLength_1d10423a-bbad-4abd-9858-62c5d1128504" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_efe44091-7839-4c65-8377-4fd328558409" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e3cbd4b5-29a9-43df-b3eb-729a9ff635c6" xlink:to="loc_us-gaap_RestructuringCharges_efe44091-7839-4c65-8377-4fd328558409" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_3422ee74-56b2-4b4b-b58d-4dc1bbb008eb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e3cbd4b5-29a9-43df-b3eb-729a9ff635c6" xlink:to="loc_us-gaap_RestructuringReserve_3422ee74-56b2-4b4b-b58d-4dc1bbb008eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1c159cef-89f7-4aa3-8b48-5325b2d211a5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_e3cbd4b5-29a9-43df-b3eb-729a9ff635c6" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1c159cef-89f7-4aa3-8b48-5325b2d211a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_fe9da1eb-f965-4d35-a423-83427f79579b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1c159cef-89f7-4aa3-8b48-5325b2d211a5" xlink:to="loc_us-gaap_RestructuringPlanAxis_fe9da1eb-f965-4d35-a423-83427f79579b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_fe9da1eb-f965-4d35-a423-83427f79579b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_fe9da1eb-f965-4d35-a423-83427f79579b" xlink:to="loc_us-gaap_RestructuringPlanDomain_fe9da1eb-f965-4d35-a423-83427f79579b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_41d16e89-d8dc-4d66-9cd5-c34a79a057fe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_fe9da1eb-f965-4d35-a423-83427f79579b" xlink:to="loc_us-gaap_RestructuringPlanDomain_41d16e89-d8dc-4d66-9cd5-c34a79a057fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SignetPathToBrillianceMember_7a465c09-c355-48f0-bb4d-dfc0c2662740" xlink:href="sig-20211030.xsd#sig_SignetPathToBrillianceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_41d16e89-d8dc-4d66-9cd5-c34a79a057fe" xlink:to="loc_sig_SignetPathToBrillianceMember_7a465c09-c355-48f0-bb4d-dfc0c2662740" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_3ab44e56-4428-4659-974b-b50365f9fe7c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1c159cef-89f7-4aa3-8b48-5325b2d211a5" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_3ab44e56-4428-4659-974b-b50365f9fe7c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_3ab44e56-4428-4659-974b-b50365f9fe7c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_3ab44e56-4428-4659-974b-b50365f9fe7c" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_3ab44e56-4428-4659-974b-b50365f9fe7c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_ea4411b2-72fa-477c-814b-d73fa42d9d03" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_3ab44e56-4428-4659-974b-b50365f9fe7c" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_ea4411b2-72fa-477c-814b-d73fa42d9d03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_AccruedExpensesAndOtherCurrentLiabilitiesMember_3eaf4249-2442-4cd6-90ef-d01eded9a30f" xlink:href="sig-20211030.xsd#sig_AccruedExpensesAndOtherCurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_ea4411b2-72fa-477c-814b-d73fa42d9d03" xlink:to="loc_sig_AccruedExpensesAndOtherCurrentLiabilitiesMember_3eaf4249-2442-4cd6-90ef-d01eded9a30f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_60826f1e-56e1-4cc4-a5ba-c4e4ac6426fa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNoncurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_ea4411b2-72fa-477c-814b-d73fa42d9d03" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_60826f1e-56e1-4cc4-a5ba-c4e4ac6426fa" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/RestructuringplansRestructuringandRelatedCostsDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#RestructuringplansRestructuringandRelatedCostsDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/RestructuringplansRestructuringandRelatedCostsDetails" xlink:type="extended" id="i3fa275586727463c87c9b1a312bbfeff_RestructuringplansRestructuringandRelatedCostsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_1168a613-49f0-4a29-8a81-fb036ecf63a5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWriteDown_2208b7dc-3f4a-4136-a4bd-b7b777d56c10" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_1168a613-49f0-4a29-8a81-fb036ecf63a5" xlink:to="loc_us-gaap_InventoryWriteDown_2208b7dc-3f4a-4136-a4bd-b7b777d56c10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringCosts_64aa1154-b1e5-46c8-943c-ac276585a193" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherRestructuringCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_1168a613-49f0-4a29-8a81-fb036ecf63a5" xlink:to="loc_us-gaap_OtherRestructuringCosts_64aa1154-b1e5-46c8-943c-ac276585a193" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_7eef0379-60f1-4d54-a30c-84e4de83c6a9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_1168a613-49f0-4a29-8a81-fb036ecf63a5" xlink:to="loc_us-gaap_RestructuringCharges_7eef0379-60f1-4d54-a30c-84e4de83c6a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_e14aa9e1-73ac-4e47-93d3-833efada7337" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_1168a613-49f0-4a29-8a81-fb036ecf63a5" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_e14aa9e1-73ac-4e47-93d3-833efada7337" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_cd30ce18-1a65-4ed5-848e-768752a379b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_e14aa9e1-73ac-4e47-93d3-833efada7337" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_cd30ce18-1a65-4ed5-848e-768752a379b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_cd30ce18-1a65-4ed5-848e-768752a379b9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_cd30ce18-1a65-4ed5-848e-768752a379b9" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_cd30ce18-1a65-4ed5-848e-768752a379b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_90420546-3b0f-4b93-9087-3753aba42b9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_cd30ce18-1a65-4ed5-848e-768752a379b9" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_90420546-3b0f-4b93-9087-3753aba42b9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_InventoryChargesMember_4c8331f2-222b-4323-871a-242109d70d22" xlink:href="sig-20211030.xsd#sig_InventoryChargesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_90420546-3b0f-4b93-9087-3753aba42b9d" xlink:to="loc_sig_InventoryChargesMember_4c8331f2-222b-4323-871a-242109d70d22" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_428ac70d-965c-4462-b897-d84726ce6e89" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_90420546-3b0f-4b93-9087-3753aba42b9d" xlink:to="loc_us-gaap_EmployeeSeveranceMember_428ac70d-965c-4462-b897-d84726ce6e89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FacilityClosingMember_05e8116e-dd3c-412b-b65e-21fe8ec4ed6e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FacilityClosingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_90420546-3b0f-4b93-9087-3753aba42b9d" xlink:to="loc_us-gaap_FacilityClosingMember_05e8116e-dd3c-412b-b65e-21fe8ec4ed6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_5fcf0612-79d8-4e1c-8e66-954e9c60bfbd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_e14aa9e1-73ac-4e47-93d3-833efada7337" xlink:to="loc_us-gaap_RestructuringPlanAxis_5fcf0612-79d8-4e1c-8e66-954e9c60bfbd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_5fcf0612-79d8-4e1c-8e66-954e9c60bfbd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_5fcf0612-79d8-4e1c-8e66-954e9c60bfbd" xlink:to="loc_us-gaap_RestructuringPlanDomain_5fcf0612-79d8-4e1c-8e66-954e9c60bfbd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_71983adf-c0bd-4918-ae5e-8c5a5fa6901f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_5fcf0612-79d8-4e1c-8e66-954e9c60bfbd" xlink:to="loc_us-gaap_RestructuringPlanDomain_71983adf-c0bd-4918-ae5e-8c5a5fa6901f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SignetPathToBrillianceMember_bed8e294-ce73-4737-8560-9bd147c9c672" xlink:href="sig-20211030.xsd#sig_SignetPathToBrillianceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_71983adf-c0bd-4918-ae5e-8c5a5fa6901f" xlink:to="loc_sig_SignetPathToBrillianceMember_bed8e294-ce73-4737-8560-9bd147c9c672" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_99c45ed8-73a3-458c-8aae-d89c9b092542" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_e14aa9e1-73ac-4e47-93d3-833efada7337" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_99c45ed8-73a3-458c-8aae-d89c9b092542" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_99c45ed8-73a3-458c-8aae-d89c9b092542_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_99c45ed8-73a3-458c-8aae-d89c9b092542" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_99c45ed8-73a3-458c-8aae-d89c9b092542_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_1671c66d-ff36-4b76-9fa8-9d9ccc970639" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_99c45ed8-73a3-458c-8aae-d89c9b092542" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_1671c66d-ff36-4b76-9fa8-9d9ccc970639" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_445ce7a3-13e4-4ab0-845d-471b691971bd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_1671c66d-ff36-4b76-9fa8-9d9ccc970639" xlink:to="loc_us-gaap_CostOfSalesMember_445ce7a3-13e4-4ab0-845d-471b691971bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringChargesMember_5732fc42-1b79-44cf-b145-49e7df6d1860" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringChargesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_1671c66d-ff36-4b76-9fa8-9d9ccc970639" xlink:to="loc_us-gaap_RestructuringChargesMember_5732fc42-1b79-44cf-b145-49e7df6d1860" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/RestructuringplansScheduleofPlanLiabilitiesDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#RestructuringplansScheduleofPlanLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/RestructuringplansScheduleofPlanLiabilitiesDetails" xlink:type="extended" id="i9c46747d405742b8a78d2783b5058938_RestructuringplansScheduleofPlanLiabilitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_b3ac0b57-f1ed-48cb-a8ee-1ff9b70bb641" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_f2fc0349-34d8-43ae-b248-34a870369bea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_b3ac0b57-f1ed-48cb-a8ee-1ff9b70bb641" xlink:to="loc_us-gaap_RestructuringReserveRollForward_f2fc0349-34d8-43ae-b248-34a870369bea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_62c61be2-ef3d-4ba4-b21c-117e2498edd6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_f2fc0349-34d8-43ae-b248-34a870369bea" xlink:to="loc_us-gaap_RestructuringReserve_62c61be2-ef3d-4ba4-b21c-117e2498edd6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_79752de7-1dc0-4eea-a3fe-84dc7595a196" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_f2fc0349-34d8-43ae-b248-34a870369bea" xlink:to="loc_us-gaap_PaymentsForRestructuring_79752de7-1dc0-4eea-a3fe-84dc7595a196" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_9b8aa926-63ca-420a-a361-c0d39ccaff04" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_f2fc0349-34d8-43ae-b248-34a870369bea" xlink:to="loc_us-gaap_RestructuringCharges_9b8aa926-63ca-420a-a361-c0d39ccaff04" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_448cd304-e98c-453a-b83c-8c21b52ab19b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringReserve"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_2840a4ca-22dd-4275-8889-29f22c080d41" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_b3ac0b57-f1ed-48cb-a8ee-1ff9b70bb641" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_2840a4ca-22dd-4275-8889-29f22c080d41" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_ff886d85-1569-40d4-8a37-cf1c3a548a31" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_2840a4ca-22dd-4275-8889-29f22c080d41" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_ff886d85-1569-40d4-8a37-cf1c3a548a31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_ff886d85-1569-40d4-8a37-cf1c3a548a31_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_ff886d85-1569-40d4-8a37-cf1c3a548a31" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_ff886d85-1569-40d4-8a37-cf1c3a548a31_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_05391366-6415-46bf-85fc-33c54ad76c07" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_ff886d85-1569-40d4-8a37-cf1c3a548a31" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_05391366-6415-46bf-85fc-33c54ad76c07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_1467ff43-9981-4507-b604-48f5e0fae988" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_05391366-6415-46bf-85fc-33c54ad76c07" xlink:to="loc_us-gaap_EmployeeSeveranceMember_1467ff43-9981-4507-b604-48f5e0fae988" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_NonTerminationBenefitCostsMember_0d3266b7-ff5b-4330-8426-c0b6a6757c47" xlink:href="sig-20211030.xsd#sig_NonTerminationBenefitCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_05391366-6415-46bf-85fc-33c54ad76c07" xlink:to="loc_sig_NonTerminationBenefitCostsMember_0d3266b7-ff5b-4330-8426-c0b6a6757c47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_7c0b2c60-ae62-4705-a7d6-29ddddb7df2d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_2840a4ca-22dd-4275-8889-29f22c080d41" xlink:to="loc_us-gaap_RestructuringPlanAxis_7c0b2c60-ae62-4705-a7d6-29ddddb7df2d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_7c0b2c60-ae62-4705-a7d6-29ddddb7df2d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_7c0b2c60-ae62-4705-a7d6-29ddddb7df2d" xlink:to="loc_us-gaap_RestructuringPlanDomain_7c0b2c60-ae62-4705-a7d6-29ddddb7df2d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_c9bc9672-5daf-4786-9559-874845e6ed86" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_7c0b2c60-ae62-4705-a7d6-29ddddb7df2d" xlink:to="loc_us-gaap_RestructuringPlanDomain_c9bc9672-5daf-4786-9559-874845e6ed86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SignetPathToBrillianceMember_efbb0452-2989-486b-a9e7-37fbe741f473" xlink:href="sig-20211030.xsd#sig_SignetPathToBrillianceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_c9bc9672-5daf-4786-9559-874845e6ed86" xlink:to="loc_sig_SignetPathToBrillianceMember_efbb0452-2989-486b-a9e7-37fbe741f473" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/RedeemablepreferredsharesAdditionalInformationDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#RedeemablepreferredsharesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/RedeemablepreferredsharesAdditionalInformationDetails" xlink:type="extended" id="i8916d94a47e444169c12efb0d66af46c_RedeemablepreferredsharesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityLineItems_3396e254-7773-4cb5-b067-56f6399690fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_d49c9960-1290-4f93-be6b-c95570816011" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_3396e254-7773-4cb5-b067-56f6399690fb" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_d49c9960-1290-4f93-be6b-c95570816011" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_47c1a836-795a-411f-97a1-d8e5f25fdf65" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_3396e254-7773-4cb5-b067-56f6399690fb" xlink:to="loc_us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues_47c1a836-795a-411f-97a1-d8e5f25fdf65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssuedPricePerShare_2dd002f9-f77e-40b0-97e0-def1064937e0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharesIssuedPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_3396e254-7773-4cb5-b067-56f6399690fb" xlink:to="loc_us-gaap_SharesIssuedPricePerShare_2dd002f9-f77e-40b0-97e0-def1064937e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendRatePercentage_5d55637c-35f9-44c9-b1b3-da67bac10762" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockDividendRatePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_3396e254-7773-4cb5-b067-56f6399690fb" xlink:to="loc_us-gaap_PreferredStockDividendRatePercentage_5d55637c-35f9-44c9-b1b3-da67bac10762" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_PreferredStockIncreaseInStatedValuePerShare_a2993635-12dc-4863-9855-341e82994944" xlink:href="sig-20211030.xsd#sig_PreferredStockIncreaseInStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_3396e254-7773-4cb5-b067-56f6399690fb" xlink:to="loc_sig_PreferredStockIncreaseInStatedValuePerShare_a2993635-12dc-4863-9855-341e82994944" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_eefe2e58-f373-4b5f-a958-26deb2898e12" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_3396e254-7773-4cb5-b067-56f6399690fb" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_eefe2e58-f373-4b5f-a958-26deb2898e12" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_TemporaryEquityAccumulatedAccretionofDividends_a27ec921-6bba-4c31-884b-daffa128aa45" xlink:href="sig-20211030.xsd#sig_TemporaryEquityAccumulatedAccretionofDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_3396e254-7773-4cb5-b067-56f6399690fb" xlink:to="loc_sig_TemporaryEquityAccumulatedAccretionofDividends_a27ec921-6bba-4c31-884b-daffa128aa45" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityAccretionToRedemptionValue_2a46ea3c-bd3c-4a67-afb6-eb9d12440fd2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityAccretionToRedemptionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_3396e254-7773-4cb5-b067-56f6399690fb" xlink:to="loc_us-gaap_TemporaryEquityAccretionToRedemptionValue_2a46ea3c-bd3c-4a67-afb6-eb9d12440fd2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityByClassOfStockTable_9ae2736a-4bf4-4a11-ad1d-ad5998b9a207" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityByClassOfStockTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_TemporaryEquityLineItems_3396e254-7773-4cb5-b067-56f6399690fb" xlink:to="loc_us-gaap_TemporaryEquityByClassOfStockTable_9ae2736a-4bf4-4a11-ad1d-ad5998b9a207" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_b4a1b9a4-81c0-4f1b-beda-a7e2c6b728e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_9ae2736a-4bf4-4a11-ad1d-ad5998b9a207" xlink:to="loc_us-gaap_StatementClassOfStockAxis_b4a1b9a4-81c0-4f1b-beda-a7e2c6b728e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_b4a1b9a4-81c0-4f1b-beda-a7e2c6b728e5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_b4a1b9a4-81c0-4f1b-beda-a7e2c6b728e5" xlink:to="loc_us-gaap_ClassOfStockDomain_b4a1b9a4-81c0-4f1b-beda-a7e2c6b728e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_74fe61f1-6cdf-4e3b-9a5e-befa2b50dd23" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_b4a1b9a4-81c0-4f1b-beda-a7e2c6b728e5" xlink:to="loc_us-gaap_ClassOfStockDomain_74fe61f1-6cdf-4e3b-9a5e-befa2b50dd23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_47edc966-b64c-47f8-ae03-c486558d3f53" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_74fe61f1-6cdf-4e3b-9a5e-befa2b50dd23" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_47edc966-b64c-47f8-ae03-c486558d3f53" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/RedeemablepreferredsharesRedeemablePreferredSharesDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#RedeemablepreferredsharesRedeemablePreferredSharesDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/RedeemablepreferredsharesRedeemablePreferredSharesDetails" xlink:type="extended" id="i5e8e3417c0644279925e3c0e8360effc_RedeemablepreferredsharesRedeemablePreferredSharesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityLineItems_de9c8b9d-7f9f-4e7a-ada0-58b871ba32ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ConversionofStockConversionRatio_57732380-ce3c-48ea-b226-189f450c59af" xlink:href="sig-20211030.xsd#sig_ConversionofStockConversionRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_de9c8b9d-7f9f-4e7a-ada0-58b871ba32ea" xlink:to="loc_sig_ConversionofStockConversionRatio_57732380-ce3c-48ea-b226-189f450c59af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ConversionofStockConversionPrice_c3633f1c-a0f0-46fb-846e-b1541cb823e2" xlink:href="sig-20211030.xsd#sig_ConversionofStockConversionPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_de9c8b9d-7f9f-4e7a-ada0-58b871ba32ea" xlink:to="loc_sig_ConversionofStockConversionPrice_c3633f1c-a0f0-46fb-846e-b1541cb823e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_bec76918-3bcf-46b6-9ac7-d43646e3e1f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_de9c8b9d-7f9f-4e7a-ada0-58b871ba32ea" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_bec76918-3bcf-46b6-9ac7-d43646e3e1f0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityLiquidationPreference_c3cf02c0-c746-4915-b666-e6bce65e1543" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityLiquidationPreference"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_de9c8b9d-7f9f-4e7a-ada0-58b871ba32ea" xlink:to="loc_us-gaap_TemporaryEquityLiquidationPreference_c3cf02c0-c746-4915-b666-e6bce65e1543" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityByClassOfStockTable_f58f2ce4-3f65-4a39-a122-c9e877eebfec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TemporaryEquityByClassOfStockTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_TemporaryEquityLineItems_de9c8b9d-7f9f-4e7a-ada0-58b871ba32ea" xlink:to="loc_us-gaap_TemporaryEquityByClassOfStockTable_f58f2ce4-3f65-4a39-a122-c9e877eebfec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_701b9a56-8049-4acb-9740-68d0ae84bc69" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_f58f2ce4-3f65-4a39-a122-c9e877eebfec" xlink:to="loc_us-gaap_StatementClassOfStockAxis_701b9a56-8049-4acb-9740-68d0ae84bc69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_701b9a56-8049-4acb-9740-68d0ae84bc69_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_701b9a56-8049-4acb-9740-68d0ae84bc69" xlink:to="loc_us-gaap_ClassOfStockDomain_701b9a56-8049-4acb-9740-68d0ae84bc69_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_d15e7fe2-33ba-4b37-8edd-3b790874a70e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_701b9a56-8049-4acb-9740-68d0ae84bc69" xlink:to="loc_us-gaap_ClassOfStockDomain_d15e7fe2-33ba-4b37-8edd-3b790874a70e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_1b47321f-33af-4573-8676-831ac8203c07" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_d15e7fe2-33ba-4b37-8edd-3b790874a70e" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_1b47321f-33af-4573-8676-831ac8203c07" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/ShareholdersequityDividendsDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#ShareholdersequityDividendsDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/ShareholdersequityDividendsDetails" xlink:type="extended" id="i33f492df95d54ac2be76949456e86d32_ShareholdersequityDividendsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableLineItems_763a918c-46d3-4e92-9d02-7c8b7e7fc28b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsPayableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_94b6a626-936c-44ca-a235-96dc7f04d515" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_763a918c-46d3-4e92-9d02-7c8b7e7fc28b" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_94b6a626-936c-44ca-a235-96dc7f04d515" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_476f3670-8906-4539-b649-ad06a48307d6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_763a918c-46d3-4e92-9d02-7c8b7e7fc28b" xlink:to="loc_us-gaap_DividendsCommonStockCash_476f3670-8906-4539-b649-ad06a48307d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsPerShareDeclared_64d77b1b-9ad3-4eb9-8940-c6720d1dbaaa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_763a918c-46d3-4e92-9d02-7c8b7e7fc28b" xlink:to="loc_us-gaap_PreferredStockDividendsPerShareDeclared_64d77b1b-9ad3-4eb9-8940-c6720d1dbaaa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPreferredStockPaidinkind_2319a43a-0e32-45f2-9f76-1224112ee13b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsPreferredStockPaidinkind"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_763a918c-46d3-4e92-9d02-7c8b7e7fc28b" xlink:to="loc_us-gaap_DividendsPreferredStockPaidinkind_2319a43a-0e32-45f2-9f76-1224112ee13b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableCurrent_fce0a12c-7959-4c15-b61a-0f44d65bf94e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_763a918c-46d3-4e92-9d02-7c8b7e7fc28b" xlink:to="loc_us-gaap_DividendsPayableCurrent_fce0a12c-7959-4c15-b61a-0f44d65bf94e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableTable_33ab622b-cd0e-4644-b223-d9855d231d68" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DividendsPayableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DividendsPayableLineItems_763a918c-46d3-4e92-9d02-7c8b7e7fc28b" xlink:to="loc_us-gaap_DividendsPayableTable_33ab622b-cd0e-4644-b223-d9855d231d68" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_1fea28bb-4d3f-483f-8f82-87cde95ebf01" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DividendsPayableTable_33ab622b-cd0e-4644-b223-d9855d231d68" xlink:to="loc_us-gaap_StatementClassOfStockAxis_1fea28bb-4d3f-483f-8f82-87cde95ebf01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_1fea28bb-4d3f-483f-8f82-87cde95ebf01_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1fea28bb-4d3f-483f-8f82-87cde95ebf01" xlink:to="loc_us-gaap_ClassOfStockDomain_1fea28bb-4d3f-483f-8f82-87cde95ebf01_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_64615fe1-6325-4352-b06f-869972045e4e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_1fea28bb-4d3f-483f-8f82-87cde95ebf01" xlink:to="loc_us-gaap_ClassOfStockDomain_64615fe1-6325-4352-b06f-869972045e4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_0e6d7a20-1f7a-45c0-bbab-9fbe570cea40" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_64615fe1-6325-4352-b06f-869972045e4e" xlink:to="loc_us-gaap_CommonStockMember_0e6d7a20-1f7a-45c0-bbab-9fbe570cea40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_13629197-42bd-4186-b3e4-ff1c9ad83d0f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_64615fe1-6325-4352-b06f-869972045e4e" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_13629197-42bd-4186-b3e4-ff1c9ad83d0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_60c857af-0ca2-41db-ac4e-c596c0bc54cb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DividendsPayableTable_33ab622b-cd0e-4644-b223-d9855d231d68" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_60c857af-0ca2-41db-ac4e-c596c0bc54cb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_60c857af-0ca2-41db-ac4e-c596c0bc54cb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_60c857af-0ca2-41db-ac4e-c596c0bc54cb" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_60c857af-0ca2-41db-ac4e-c596c0bc54cb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_692b42bf-350c-4f44-9c6c-2aa93c28338a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_60c857af-0ca2-41db-ac4e-c596c0bc54cb" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_692b42bf-350c-4f44-9c6c-2aa93c28338a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_AccruedExpensesAndOtherCurrentLiabilitiesMember_7de222d9-061f-4350-9799-1dedf83cb387" xlink:href="sig-20211030.xsd#sig_AccruedExpensesAndOtherCurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_692b42bf-350c-4f44-9c6c-2aa93c28338a" xlink:to="loc_sig_AccruedExpensesAndOtherCurrentLiabilitiesMember_7de222d9-061f-4350-9799-1dedf83cb387" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/ShareholdersequityShareRepurchaseDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#ShareholdersequityShareRepurchaseDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/ShareholdersequityShareRepurchaseDetails" xlink:type="extended" id="i72908c2077304c3c9e9f2400d44a3598_ShareholdersequityShareRepurchaseDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_22c86086-068e-4017-b5fe-edc56a48cfef" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_5a0e3426-99b7-4bd5-8d81-9be97ff223a5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_22c86086-068e-4017-b5fe-edc56a48cfef" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_5a0e3426-99b7-4bd5-8d81-9be97ff223a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_6a1248ba-297f-45cb-ac30-d44f490a441a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_22c86086-068e-4017-b5fe-edc56a48cfef" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_6a1248ba-297f-45cb-ac30-d44f490a441a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_707573d2-a060-4343-a507-a52cffb05bcd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_22c86086-068e-4017-b5fe-edc56a48cfef" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_707573d2-a060-4343-a507-a52cffb05bcd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_c85ba6ac-1773-476e-858c-bc18190b20e4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_22c86086-068e-4017-b5fe-edc56a48cfef" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_c85ba6ac-1773-476e-858c-bc18190b20e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_829c759a-1315-4093-a060-a882b8351197" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_22c86086-068e-4017-b5fe-edc56a48cfef" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_829c759a-1315-4093-a060-a882b8351197" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_7a26d6c7-328b-4ee5-b20e-dbd8b9252520" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_22c86086-068e-4017-b5fe-edc56a48cfef" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_7a26d6c7-328b-4ee5-b20e-dbd8b9252520" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_b84c1911-852d-4b09-9402-d149c04d3053" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_7a26d6c7-328b-4ee5-b20e-dbd8b9252520" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_b84c1911-852d-4b09-9402-d149c04d3053" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_b84c1911-852d-4b09-9402-d149c04d3053_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_b84c1911-852d-4b09-9402-d149c04d3053" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_b84c1911-852d-4b09-9402-d149c04d3053_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_eaa054e0-58d5-41e3-b05a-5cadf9e9ed81" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_b84c1911-852d-4b09-9402-d149c04d3053" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_eaa054e0-58d5-41e3-b05a-5cadf9e9ed81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ShareRepurchaseProgramTwentySeventeenMember_fd0dc94a-48f4-4eaf-a32e-397944fb2492" xlink:href="sig-20211030.xsd#sig_ShareRepurchaseProgramTwentySeventeenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_eaa054e0-58d5-41e3-b05a-5cadf9e9ed81" xlink:to="loc_sig_ShareRepurchaseProgramTwentySeventeenMember_fd0dc94a-48f4-4eaf-a32e-397944fb2492" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/EarningslosspercommonshareEPSScheduleofAntidilutiveSecuritiesExcludedFromComputationofEarningsPerShareDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#EarningslosspercommonshareEPSScheduleofAntidilutiveSecuritiesExcludedFromComputationofEarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/EarningslosspercommonshareEPSScheduleofAntidilutiveSecuritiesExcludedFromComputationofEarningsPerShareDetails" xlink:type="extended" id="i986cb77e32ff481d884e53fadb3d94a3_EarningslosspercommonshareEPSScheduleofAntidilutiveSecuritiesExcludedFromComputationofEarningsPerShareDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_0c641419-3884-4ad9-99b8-ecea9699c416" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_6e605c05-57c1-4424-935b-936d2bbf540e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_0c641419-3884-4ad9-99b8-ecea9699c416" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_6e605c05-57c1-4424-935b-936d2bbf540e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_6136d96e-4ffd-49d2-9212-d19a14193c54" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_0c641419-3884-4ad9-99b8-ecea9699c416" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_6136d96e-4ffd-49d2-9212-d19a14193c54" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_e274f53e-2ed7-4d07-a4c7-611b16f306ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_6136d96e-4ffd-49d2-9212-d19a14193c54" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_e274f53e-2ed7-4d07-a4c7-611b16f306ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_e274f53e-2ed7-4d07-a4c7-611b16f306ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_e274f53e-2ed7-4d07-a4c7-611b16f306ab" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_e274f53e-2ed7-4d07-a4c7-611b16f306ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_cef682d2-1e25-4b8a-86ab-9b4aa6729169" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_e274f53e-2ed7-4d07-a4c7-611b16f306ab" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_cef682d2-1e25-4b8a-86ab-9b4aa6729169" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_2b9f06e5-7d8b-45b3-9b49-fb72654cb78f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_cef682d2-1e25-4b8a-86ab-9b4aa6729169" xlink:to="loc_us-gaap_PerformanceSharesMember_2b9f06e5-7d8b-45b3-9b49-fb72654cb78f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableConvertiblePreferredStockMember_7bc98114-51e4-49b1-8c29-deead3f81122" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RedeemableConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_cef682d2-1e25-4b8a-86ab-9b4aa6729169" xlink:to="loc_us-gaap_RedeemableConvertiblePreferredStockMember_7bc98114-51e4-49b1-8c29-deead3f81122" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/AccumulatedothercomprehensiveincomelossChangesinAccumulatedOCIbyComponentandReclassificationsOutofAccumulatedOCIDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#AccumulatedothercomprehensiveincomelossChangesinAccumulatedOCIbyComponentandReclassificationsOutofAccumulatedOCIDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/AccumulatedothercomprehensiveincomelossChangesinAccumulatedOCIbyComponentandReclassificationsOutofAccumulatedOCIDetails" xlink:type="extended" id="ia285d16ff65b4b8b882da48f9e8bd6ec_AccumulatedothercomprehensiveincomelossChangesinAccumulatedOCIbyComponentandReclassificationsOutofAccumulatedOCIDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_f9aefc19-1e6d-40d2-b25e-d37700b98270" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_fa1b9745-908e-444b-81af-6ed7e6360dff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_f9aefc19-1e6d-40d2-b25e-d37700b98270" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_fa1b9745-908e-444b-81af-6ed7e6360dff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_c385dbed-93a6-48f7-afd6-8c7fd50ea81d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_fa1b9745-908e-444b-81af-6ed7e6360dff" xlink:to="loc_us-gaap_StockholdersEquity_c385dbed-93a6-48f7-afd6-8c7fd50ea81d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_7fce4257-1c86-4bfd-98b4-3cc4b06ef2fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_fa1b9745-908e-444b-81af-6ed7e6360dff" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_7fce4257-1c86-4bfd-98b4-3cc4b06ef2fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_729b51fb-b29c-4e57-b8a4-a71db9a9f173" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_fa1b9745-908e-444b-81af-6ed7e6360dff" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_729b51fb-b29c-4e57-b8a4-a71db9a9f173" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_e8e60d16-84ac-467e-80df-9cc6cdd52dbe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_fa1b9745-908e-444b-81af-6ed7e6360dff" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_e8e60d16-84ac-467e-80df-9cc6cdd52dbe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_4414cdae-4023-4d2c-bd72-0d7122fe5933" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_32c68bbb-d133-4380-80d6-a281528adda3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_f9aefc19-1e6d-40d2-b25e-d37700b98270" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_32c68bbb-d133-4380-80d6-a281528adda3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_20f3cc9b-b849-472f-8d5e-5242a50fa1c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_32c68bbb-d133-4380-80d6-a281528adda3" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_20f3cc9b-b849-472f-8d5e-5242a50fa1c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_20f3cc9b-b849-472f-8d5e-5242a50fa1c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_20f3cc9b-b849-472f-8d5e-5242a50fa1c3" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_20f3cc9b-b849-472f-8d5e-5242a50fa1c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_9fe06b92-1369-429c-9d84-494a6b1fffea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_20f3cc9b-b849-472f-8d5e-5242a50fa1c3" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_9fe06b92-1369-429c-9d84-494a6b1fffea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_0ddfcd88-cabc-447e-a318-660eaeb7fd2b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_9fe06b92-1369-429c-9d84-494a6b1fffea" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_0ddfcd88-cabc-447e-a318-660eaeb7fd2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_bc0e3810-5b3e-42ef-834a-1502167e37b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_32c68bbb-d133-4380-80d6-a281528adda3" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_bc0e3810-5b3e-42ef-834a-1502167e37b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_bc0e3810-5b3e-42ef-834a-1502167e37b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_bc0e3810-5b3e-42ef-834a-1502167e37b0" xlink:to="loc_us-gaap_EquityComponentDomain_bc0e3810-5b3e-42ef-834a-1502167e37b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_faea6765-fd4d-40bd-a3c2-a33a899d9b22" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_bc0e3810-5b3e-42ef-834a-1502167e37b0" xlink:to="loc_us-gaap_EquityComponentDomain_faea6765-fd4d-40bd-a3c2-a33a899d9b22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c15e48dc-4759-49a3-9b43-21fcad117b74" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_faea6765-fd4d-40bd-a3c2-a33a899d9b22" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c15e48dc-4759-49a3-9b43-21fcad117b74" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_c7555c71-85e2-4b3e-9832-ade7ebdf2d2a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c15e48dc-4759-49a3-9b43-21fcad117b74" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_c7555c71-85e2-4b3e-9832-ade7ebdf2d2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_8e2a723d-c59c-4a28-93e3-423fa7d267fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c15e48dc-4759-49a3-9b43-21fcad117b74" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_8e2a723d-c59c-4a28-93e3-423fa7d267fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_1aacb762-c421-4fff-8818-f1ce73140d3d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c15e48dc-4759-49a3-9b43-21fcad117b74" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_1aacb762-c421-4fff-8818-f1ce73140d3d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_89f1c0db-89e5-40b6-8c4c-cc6253c257a5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c15e48dc-4759-49a3-9b43-21fcad117b74" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_89f1c0db-89e5-40b6-8c4c-cc6253c257a5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_7161c8de-99f5-4d05-8100-13d3ec4bfa1e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_c15e48dc-4759-49a3-9b43-21fcad117b74" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_7161c8de-99f5-4d05-8100-13d3ec4bfa1e" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/AccumulatedothercomprehensiveincomelossReclassificationsoutofAOCIDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#AccumulatedothercomprehensiveincomelossReclassificationsoutofAOCIDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/AccumulatedothercomprehensiveincomelossReclassificationsoutofAOCIDetails" xlink:type="extended" id="ib6ed9797414a43f6919644f369271052_AccumulatedothercomprehensiveincomelossReclassificationsoutofAOCIDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_45225ba0-a3e1-4bf1-9868-a0684dc3ede6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_9ba0762e-9686-44f8-9f6f-910942dfbc66" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_45225ba0-a3e1-4bf1-9868-a0684dc3ede6" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_9ba0762e-9686-44f8-9f6f-910942dfbc66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseNet_76107a82-24df-4a49-a027-209931696201" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherOperatingIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_45225ba0-a3e1-4bf1-9868-a0684dc3ede6" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseNet_76107a82-24df-4a49-a027-209931696201" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_f7d45333-9996-469a-af10-b40b5f6f0d9b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_45225ba0-a3e1-4bf1-9868-a0684dc3ede6" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_f7d45333-9996-469a-af10-b40b5f6f0d9b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_251d4e1d-4779-4580-aab1-4554da677a9f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_45225ba0-a3e1-4bf1-9868-a0684dc3ede6" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_251d4e1d-4779-4580-aab1-4554da677a9f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_90d9a3c3-4b5c-43fc-a120-5ad933eaa1ec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_45225ba0-a3e1-4bf1-9868-a0684dc3ede6" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_90d9a3c3-4b5c-43fc-a120-5ad933eaa1ec" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_9cb8f42b-eb3c-4462-a48c-1b2ab5f0d4cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_45225ba0-a3e1-4bf1-9868-a0684dc3ede6" xlink:to="loc_us-gaap_NetIncomeLoss_9cb8f42b-eb3c-4462-a48c-1b2ab5f0d4cc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a6f53b91-2d04-4b83-b6a2-a660cb6521c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_45225ba0-a3e1-4bf1-9868-a0684dc3ede6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a6f53b91-2d04-4b83-b6a2-a660cb6521c6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_ae4041f1-9803-4983-aee2-deb1846dcca1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a6f53b91-2d04-4b83-b6a2-a660cb6521c6" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_ae4041f1-9803-4983-aee2-deb1846dcca1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_ae4041f1-9803-4983-aee2-deb1846dcca1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_ae4041f1-9803-4983-aee2-deb1846dcca1" xlink:to="loc_us-gaap_EquityComponentDomain_ae4041f1-9803-4983-aee2-deb1846dcca1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e46a3a39-67d1-4b92-9248-c88826cc611a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_ae4041f1-9803-4983-aee2-deb1846dcca1" xlink:to="loc_us-gaap_EquityComponentDomain_e46a3a39-67d1-4b92-9248-c88826cc611a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_5962b742-fa6c-4973-8bf4-260c13d9d804" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e46a3a39-67d1-4b92-9248-c88826cc611a" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_5962b742-fa6c-4973-8bf4-260c13d9d804" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_AccumulatedGainLossNetCashFlowHedgeExcludingDedesignationParentMember_3f2b4fa3-0e4a-42bd-9100-ef9cef5fd701" xlink:href="sig-20211030.xsd#sig_AccumulatedGainLossNetCashFlowHedgeExcludingDedesignationParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_5962b742-fa6c-4973-8bf4-260c13d9d804" xlink:to="loc_sig_AccumulatedGainLossNetCashFlowHedgeExcludingDedesignationParentMember_3f2b4fa3-0e4a-42bd-9100-ef9cef5fd701" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_AccumulatedGainLossNetDedesignatedCashFlowHedgeParentMember_2b92deca-ee74-4c54-8f2c-1773ab94a247" xlink:href="sig-20211030.xsd#sig_AccumulatedGainLossNetDedesignatedCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_5962b742-fa6c-4973-8bf4-260c13d9d804" xlink:to="loc_sig_AccumulatedGainLossNetDedesignatedCashFlowHedgeParentMember_2b92deca-ee74-4c54-8f2c-1773ab94a247" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_3a639a15-0cc6-4e5a-9b9f-8a0b2aebc922" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e46a3a39-67d1-4b92-9248-c88826cc611a" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_3a639a15-0cc6-4e5a-9b9f-8a0b2aebc922" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_3f3fc529-8bdb-44b9-9d63-95d86244bc82" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_3a639a15-0cc6-4e5a-9b9f-8a0b2aebc922" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_3f3fc529-8bdb-44b9-9d63-95d86244bc82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_4a10b373-ef98-42e8-91bc-f9be3d81f0d3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_3a639a15-0cc6-4e5a-9b9f-8a0b2aebc922" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_4a10b373-ef98-42e8-91bc-f9be3d81f0d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_dd995afb-2c8a-441a-b79d-09fb2883c025" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a6f53b91-2d04-4b83-b6a2-a660cb6521c6" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_dd995afb-2c8a-441a-b79d-09fb2883c025" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_dd995afb-2c8a-441a-b79d-09fb2883c025_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_dd995afb-2c8a-441a-b79d-09fb2883c025" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_dd995afb-2c8a-441a-b79d-09fb2883c025_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_7d401424-58ae-4048-84cb-f91fdfa6f11b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis_dd995afb-2c8a-441a-b79d-09fb2883c025" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_7d401424-58ae-4048-84cb-f91fdfa6f11b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_f8ee1a0e-fee0-4724-8f99-0861486d4d71" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeDomain_7d401424-58ae-4048-84cb-f91fdfa6f11b" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember_f8ee1a0e-fee0-4724-8f99-0861486d4d71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_29515004-0865-4808-bc0e-eee792c59b3a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_a6f53b91-2d04-4b83-b6a2-a660cb6521c6" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_29515004-0865-4808-bc0e-eee792c59b3a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_29515004-0865-4808-bc0e-eee792c59b3a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_29515004-0865-4808-bc0e-eee792c59b3a" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_29515004-0865-4808-bc0e-eee792c59b3a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_502ae161-b677-428b-ab03-be17bd3ab4b2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_29515004-0865-4808-bc0e-eee792c59b3a" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_502ae161-b677-428b-ab03-be17bd3ab4b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_a9a4f513-59ee-4bcd-bfce-e710dfa0dff3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_502ae161-b677-428b-ab03-be17bd3ab4b2" xlink:to="loc_us-gaap_ForeignExchangeContractMember_a9a4f513-59ee-4bcd-bfce-e710dfa0dff3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_8b6c6824-a792-43d5-aae6-7c9e184b1392" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_502ae161-b677-428b-ab03-be17bd3ab4b2" xlink:to="loc_us-gaap_CommodityContractMember_8b6c6824-a792-43d5-aae6-7c9e184b1392" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/CredittransactionsDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#CredittransactionsDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/CredittransactionsDetails" xlink:type="extended" id="i0d6789c5348e46949dfc05f0c676cf10_CredittransactionsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50f11d0f-6c81-4bb0-aeb8-670f9d0a977b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_AccountsReceivableRemainingPurchasePriceofReceivablesSoldPercentage_619ad43c-69cc-401e-ba94-5a81d6dc8d03" xlink:href="sig-20211030.xsd#sig_AccountsReceivableRemainingPurchasePriceofReceivablesSoldPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50f11d0f-6c81-4bb0-aeb8-670f9d0a977b" xlink:to="loc_sig_AccountsReceivableRemainingPurchasePriceofReceivablesSoldPercentage_619ad43c-69cc-401e-ba94-5a81d6dc8d03" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SaleOfReceivablesAdditionalPercentagePurchased_3634dec9-0c93-41e2-8386-8dd2feeae3bc" xlink:href="sig-20211030.xsd#sig_SaleOfReceivablesAdditionalPercentagePurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50f11d0f-6c81-4bb0-aeb8-670f9d0a977b" xlink:to="loc_sig_SaleOfReceivablesAdditionalPercentagePurchased_3634dec9-0c93-41e2-8386-8dd2feeae3bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_FinancingReceivableAgreementRenewalTerm_d14ffc2f-330c-4c74-adbb-b0403c276e2a" xlink:href="sig-20211030.xsd#sig_FinancingReceivableAgreementRenewalTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50f11d0f-6c81-4bb0-aeb8-670f9d0a977b" xlink:to="loc_sig_FinancingReceivableAgreementRenewalTerm_d14ffc2f-330c-4c74-adbb-b0403c276e2a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfFinanceReceivables_3c1d033f-758d-4105-aba4-6662b4824d90" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromSaleOfFinanceReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50f11d0f-6c81-4bb0-aeb8-670f9d0a977b" xlink:to="loc_us-gaap_ProceedsFromSaleOfFinanceReceivables_3c1d033f-758d-4105-aba4-6662b4824d90" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableNet_4d0836a5-d30e-4d3c-8f27-926da130bf94" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50f11d0f-6c81-4bb0-aeb8-670f9d0a977b" xlink:to="loc_us-gaap_NotesReceivableNet_4d0836a5-d30e-4d3c-8f27-926da130bf94" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfNotesReceivable_6d580c59-2d84-4b53-833a-d682d47e6ea1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnSaleOfNotesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50f11d0f-6c81-4bb0-aeb8-670f9d0a977b" xlink:to="loc_us-gaap_GainLossOnSaleOfNotesReceivable_6d580c59-2d84-4b53-833a-d682d47e6ea1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromCollectionOfFinanceReceivables_d4a66163-20a2-49b6-9cdc-8146d5c738db" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromCollectionOfFinanceReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50f11d0f-6c81-4bb0-aeb8-670f9d0a977b" xlink:to="loc_us-gaap_ProceedsFromCollectionOfFinanceReceivables_d4a66163-20a2-49b6-9cdc-8146d5c738db" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_42294cfe-b95e-4c03-a9c4-74bccc8f1dad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_50f11d0f-6c81-4bb0-aeb8-670f9d0a977b" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_42294cfe-b95e-4c03-a9c4-74bccc8f1dad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_21ed2d38-f4a4-4880-89f6-64f7eb7bf309" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_42294cfe-b95e-4c03-a9c4-74bccc8f1dad" xlink:to="loc_srt_CounterpartyNameAxis_21ed2d38-f4a4-4880-89f6-64f7eb7bf309" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_21ed2d38-f4a4-4880-89f6-64f7eb7bf309_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_21ed2d38-f4a4-4880-89f6-64f7eb7bf309" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_21ed2d38-f4a4-4880-89f6-64f7eb7bf309_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_64f08260-a900-4bc7-bef1-fa5776c5b6c8" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_21ed2d38-f4a4-4880-89f6-64f7eb7bf309" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_64f08260-a900-4bc7-bef1-fa5776c5b6c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_CarValandCastlelakeMember_f1788d43-cb87-4a32-b8c3-4dfcf31f6fac" xlink:href="sig-20211030.xsd#sig_CarValandCastlelakeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_64f08260-a900-4bc7-bef1-fa5776c5b6c8" xlink:to="loc_sig_CarValandCastlelakeMember_f1788d43-cb87-4a32-b8c3-4dfcf31f6fac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_CarValMember_a8e51e72-4fd4-4298-8e53-1130ad24bd97" xlink:href="sig-20211030.xsd#sig_CarValMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_64f08260-a900-4bc7-bef1-fa5776c5b6c8" xlink:to="loc_sig_CarValMember_a8e51e72-4fd4-4298-8e53-1130ad24bd97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_GenesisFinancialSolutionsMember_c887c2a8-d795-41a9-b57a-5198a59b5746" xlink:href="sig-20211030.xsd#sig_GenesisFinancialSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_64f08260-a900-4bc7-bef1-fa5776c5b6c8" xlink:to="loc_sig_GenesisFinancialSolutionsMember_c887c2a8-d795-41a9-b57a-5198a59b5746" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ComenityCapitalBankMember_03e75acb-c662-47ef-9d10-1b3195176f46" xlink:href="sig-20211030.xsd#sig_ComenityCapitalBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_64f08260-a900-4bc7-bef1-fa5776c5b6c8" xlink:to="loc_sig_ComenityCapitalBankMember_03e75acb-c662-47ef-9d10-1b3195176f46" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_d6396741-e15e-4b0b-8900-fbb5cb01fa83" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_42294cfe-b95e-4c03-a9c4-74bccc8f1dad" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_d6396741-e15e-4b0b-8900-fbb5cb01fa83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_d6396741-e15e-4b0b-8900-fbb5cb01fa83_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_d6396741-e15e-4b0b-8900-fbb5cb01fa83" xlink:to="loc_us-gaap_SegmentDomain_d6396741-e15e-4b0b-8900-fbb5cb01fa83_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_f8cb4723-fab8-46ca-9fdd-39c357f833e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_d6396741-e15e-4b0b-8900-fbb5cb01fa83" xlink:to="loc_us-gaap_SegmentDomain_f8cb4723-fab8-46ca-9fdd-39c357f833e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_NorthAmericaSegmentMember_717061f8-44a3-445d-a813-6b70ac663b2a" xlink:href="sig-20211030.xsd#sig_NorthAmericaSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_f8cb4723-fab8-46ca-9fdd-39c357f833e8" xlink:to="loc_sig_NorthAmericaSegmentMember_717061f8-44a3-445d-a813-6b70ac663b2a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/AccountsreceivablenetCreditQualityofFinanceReceivablesDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#AccountsreceivablenetCreditQualityofFinanceReceivablesDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/AccountsreceivablenetCreditQualityofFinanceReceivablesDetails" xlink:type="extended" id="ifa22483252ed4976b4522d9bd0615b44_AccountsreceivablenetCreditQualityofFinanceReceivablesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d25a51d3-aadc-4739-9275-32080c3fc42e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_7e0a4a90-10bc-49b4-b4bd-af7cc4eae8f8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d25a51d3-aadc-4739-9275-32080c3fc42e" xlink:to="loc_us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear_7e0a4a90-10bc-49b4-b4bd-af7cc4eae8f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_8498bf15-2551-4f92-a26e-ccdd8c721af3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_d25a51d3-aadc-4739-9275-32080c3fc42e" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_8498bf15-2551-4f92-a26e-ccdd8c721af3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentAxis_de0eb1e8-b9cc-4fb1-b33d-8e7881c33a1e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InternalCreditAssessmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_8498bf15-2551-4f92-a26e-ccdd8c721af3" xlink:to="loc_us-gaap_InternalCreditAssessmentAxis_de0eb1e8-b9cc-4fb1-b33d-8e7881c33a1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_de0eb1e8-b9cc-4fb1-b33d-8e7881c33a1e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_de0eb1e8-b9cc-4fb1-b33d-8e7881c33a1e" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_de0eb1e8-b9cc-4fb1-b33d-8e7881c33a1e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_0e0d36eb-f55b-4546-9ede-60e650e5dcdd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_de0eb1e8-b9cc-4fb1-b33d-8e7881c33a1e" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_0e0d36eb-f55b-4546-9ede-60e650e5dcdd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrimeMember_78de4844-548b-463c-a2ac-2df4b29fdbfb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_0e0d36eb-f55b-4546-9ede-60e650e5dcdd" xlink:to="loc_us-gaap_PrimeMember_78de4844-548b-463c-a2ac-2df4b29fdbfb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubprimeMember_a2a5a22b-d814-4c59-a5f4-498835a9448b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubprimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_0e0d36eb-f55b-4546-9ede-60e650e5dcdd" xlink:to="loc_us-gaap_SubprimeMember_a2a5a22b-d814-4c59-a5f4-498835a9448b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DeepSubprimeMember_c18bf4f6-74bc-42eb-8075-41d62fc8864e" xlink:href="sig-20211030.xsd#sig_DeepSubprimeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_0e0d36eb-f55b-4546-9ede-60e650e5dcdd" xlink:to="loc_sig_DeepSubprimeMember_c18bf4f6-74bc-42eb-8075-41d62fc8864e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/AccountsreceivablenetPastDueStatusDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#AccountsreceivablenetPastDueStatusDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/AccountsreceivablenetPastDueStatusDetails" xlink:type="extended" id="i251e3ba25f004d5abde31d615d83bc56_AccountsreceivablenetPastDueStatusDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_66cda150-d928-40fa-95c5-a11fcb2ae957" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableGross_04c223a6-67f9-465b-b72e-5fb2a3c8911c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NotesReceivableGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_66cda150-d928-40fa-95c5-a11fcb2ae957" xlink:to="loc_us-gaap_NotesReceivableGross_04c223a6-67f9-465b-b72e-5fb2a3c8911c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_eb4d2c53-f135-4960-bb52-346999c2c49a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFinancingReceivablesPastDueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems_66cda150-d928-40fa-95c5-a11fcb2ae957" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_eb4d2c53-f135-4960-bb52-346999c2c49a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_87fed3ef-8d17-4aec-b335-631d41da4eba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivablesPastDueTable_eb4d2c53-f135-4960-bb52-346999c2c49a" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_87fed3ef-8d17-4aec-b335-631d41da4eba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_87fed3ef-8d17-4aec-b335-631d41da4eba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_87fed3ef-8d17-4aec-b335-631d41da4eba" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_87fed3ef-8d17-4aec-b335-631d41da4eba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_b0901fef-64ae-41ac-8a2a-dc725d51458d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_87fed3ef-8d17-4aec-b335-631d41da4eba" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_b0901fef-64ae-41ac-8a2a-dc725d51458d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetNotPastDueMember_b316e71e-b233-4947-8cc5-1304d7174622" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialAssetNotPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_b0901fef-64ae-41ac-8a2a-dc725d51458d" xlink:to="loc_us-gaap_FinancialAssetNotPastDueMember_b316e71e-b233-4947-8cc5-1304d7174622" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables1To29DaysPastDueMember_99d84135-917e-4f20-8eef-b07c5749906b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivables1To29DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_b0901fef-64ae-41ac-8a2a-dc725d51458d" xlink:to="loc_us-gaap_FinancingReceivables1To29DaysPastDueMember_99d84135-917e-4f20-8eef-b07c5749906b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_a2c8bcee-e887-4976-ae48-40b439e46c00" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivables30To59DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_b0901fef-64ae-41ac-8a2a-dc725d51458d" xlink:to="loc_us-gaap_FinancingReceivables30To59DaysPastDueMember_a2c8bcee-e887-4976-ae48-40b439e46c00" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_fb9cd9ba-6d50-442b-b149-e472df8a5cb2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivables60To89DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_b0901fef-64ae-41ac-8a2a-dc725d51458d" xlink:to="loc_us-gaap_FinancingReceivables60To89DaysPastDueMember_fb9cd9ba-6d50-442b-b149-e472df8a5cb2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_a0e0b8f1-4971-4e8d-9a79-f03af584674b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_b0901fef-64ae-41ac-8a2a-dc725d51458d" xlink:to="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_a0e0b8f1-4971-4e8d-9a79-f03af584674b" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/GoodwillandintangiblesAdditionalInformationDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#GoodwillandintangiblesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/GoodwillandintangiblesAdditionalInformationDetails" xlink:type="extended" id="i83035b3713314f66ab48712d4d8f9c3b_GoodwillandintangiblesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5d3975ec-cd3f-4f4d-be21-aa68165d44b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_e672eccb-4946-4052-a651-0d71264d459e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5d3975ec-cd3f-4f4d-be21-aa68165d44b6" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_e672eccb-4946-4052-a651-0d71264d459e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_e32c87b6-faf3-4c05-b06c-3c5dce653c82" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5d3975ec-cd3f-4f4d-be21-aa68165d44b6" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_e32c87b6-faf3-4c05-b06c-3c5dce653c82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_13b9b106-f78c-4623-a158-39d8a8f3aaf0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinitelivedIntangibleAssetsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5d3975ec-cd3f-4f4d-be21-aa68165d44b6" xlink:to="loc_us-gaap_FinitelivedIntangibleAssetsAcquired1_13b9b106-f78c-4623-a158-39d8a8f3aaf0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_5c0a45b5-e02f-4c73-bf1d-c99f2444f7e2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5d3975ec-cd3f-4f4d-be21-aa68165d44b6" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_5c0a45b5-e02f-4c73-bf1d-c99f2444f7e2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_b1debcbd-db20-42a9-b51a-35018ed046d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5d3975ec-cd3f-4f4d-be21-aa68165d44b6" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_b1debcbd-db20-42a9-b51a-35018ed046d0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_70238d4c-ee67-481d-bce3-491d774b67cd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_5d3975ec-cd3f-4f4d-be21-aa68165d44b6" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_70238d4c-ee67-481d-bce3-491d774b67cd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_8783a022-fb68-4e5f-8ecd-63a3241f233f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_70238d4c-ee67-481d-bce3-491d774b67cd" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_8783a022-fb68-4e5f-8ecd-63a3241f233f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_8783a022-fb68-4e5f-8ecd-63a3241f233f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8783a022-fb68-4e5f-8ecd-63a3241f233f" xlink:to="loc_us-gaap_SegmentDomain_8783a022-fb68-4e5f-8ecd-63a3241f233f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_f738b96c-d9d3-4588-b972-d0711989135a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8783a022-fb68-4e5f-8ecd-63a3241f233f" xlink:to="loc_us-gaap_SegmentDomain_f738b96c-d9d3-4588-b972-d0711989135a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_NorthAmericaSegmentMember_23b4b214-642b-4136-ae1e-868e172a05ab" xlink:href="sig-20211030.xsd#sig_NorthAmericaSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_f738b96c-d9d3-4588-b972-d0711989135a" xlink:to="loc_sig_NorthAmericaSegmentMember_23b4b214-642b-4136-ae1e-868e172a05ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c295d58e-de51-4e42-92f2-03297e644ab8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_70238d4c-ee67-481d-bce3-491d774b67cd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c295d58e-de51-4e42-92f2-03297e644ab8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c295d58e-de51-4e42-92f2-03297e644ab8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c295d58e-de51-4e42-92f2-03297e644ab8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c295d58e-de51-4e42-92f2-03297e644ab8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4e426aee-5489-4173-9126-0ba858ea76d1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c295d58e-de51-4e42-92f2-03297e644ab8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4e426aee-5489-4173-9126-0ba858ea76d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_CertainZalesTradeNamesMember_b651c2c4-96f2-4331-87b8-cc74956d3eb7" xlink:href="sig-20211030.xsd#sig_CertainZalesTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4e426aee-5489-4173-9126-0ba858ea76d1" xlink:to="loc_sig_CertainZalesTradeNamesMember_b651c2c4-96f2-4331-87b8-cc74956d3eb7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_b9601ab7-aa9d-4628-91d0-62fe407e71ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_70238d4c-ee67-481d-bce3-491d774b67cd" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_b9601ab7-aa9d-4628-91d0-62fe407e71ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b9601ab7-aa9d-4628-91d0-62fe407e71ea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b9601ab7-aa9d-4628-91d0-62fe407e71ea" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b9601ab7-aa9d-4628-91d0-62fe407e71ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b508edc2-2e63-4deb-aae4-a1fc9591fdf1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_b9601ab7-aa9d-4628-91d0-62fe407e71ea" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b508edc2-2e63-4deb-aae4-a1fc9591fdf1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_RocksboxMember_4ec07c28-1df1-4023-a66c-2ae5fb0f716e" xlink:href="sig-20211030.xsd#sig_RocksboxMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_b508edc2-2e63-4deb-aae4-a1fc9591fdf1" xlink:to="loc_sig_RocksboxMember_4ec07c28-1df1-4023-a66c-2ae5fb0f716e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/GoodwillandintangiblesSummaryofGoodwillDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#GoodwillandintangiblesSummaryofGoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/GoodwillandintangiblesSummaryofGoodwillDetails" xlink:type="extended" id="i8578816586454e83b2f9db8e74b1a4ee_GoodwillandintangiblesSummaryofGoodwillDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_395debee-a104-4f6b-8628-f0e33b017cba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_069781a0-abca-48a0-b7b8-35941675b769" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_395debee-a104-4f6b-8628-f0e33b017cba" xlink:to="loc_us-gaap_GoodwillRollForward_069781a0-abca-48a0-b7b8-35941675b769" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_6db79958-6775-4959-9364-930a7c57b5ed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_069781a0-abca-48a0-b7b8-35941675b769" xlink:to="loc_us-gaap_Goodwill_6db79958-6775-4959-9364-930a7c57b5ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_e3c1a153-a8eb-4ed7-870e-6f18589208ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_069781a0-abca-48a0-b7b8-35941675b769" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_e3c1a153-a8eb-4ed7-870e-6f18589208ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_fd6bf6a1-c35d-438b-aa42-c1785b1824b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_d3658699-6f55-4880-b68d-0e0adfa07742" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_395debee-a104-4f6b-8628-f0e33b017cba" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_d3658699-6f55-4880-b68d-0e0adfa07742" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_c80b9f5b-37ce-48c6-b7ba-e3f7f9015af2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_395debee-a104-4f6b-8628-f0e33b017cba" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_c80b9f5b-37ce-48c6-b7ba-e3f7f9015af2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_2fedbe1a-d2e6-43c5-800d-e56616f4b97b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_c80b9f5b-37ce-48c6-b7ba-e3f7f9015af2" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_2fedbe1a-d2e6-43c5-800d-e56616f4b97b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_2fedbe1a-d2e6-43c5-800d-e56616f4b97b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_2fedbe1a-d2e6-43c5-800d-e56616f4b97b" xlink:to="loc_us-gaap_SegmentDomain_2fedbe1a-d2e6-43c5-800d-e56616f4b97b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a77c2684-0f7a-4696-af7e-f31f86dce8dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_2fedbe1a-d2e6-43c5-800d-e56616f4b97b" xlink:to="loc_us-gaap_SegmentDomain_a77c2684-0f7a-4696-af7e-f31f86dce8dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_NorthAmericaSegmentMember_a3629022-0be6-476f-819c-38fdf0af2c21" xlink:href="sig-20211030.xsd#sig_NorthAmericaSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a77c2684-0f7a-4696-af7e-f31f86dce8dd" xlink:to="loc_sig_NorthAmericaSegmentMember_a3629022-0be6-476f-819c-38fdf0af2c21" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/DerivativesAdditionalInformationDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#DerivativesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/DerivativesAdditionalInformationDetails" xlink:type="extended" id="id1cd7cf3f4ee422c94be70c984354aaa_DerivativesAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_ea2fb19a-04fb-4a81-8d52-536dba86de3c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_5163ae49-efff-4254-9bc1-b5eafc3636ae" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ea2fb19a-04fb-4a81-8d52-536dba86de3c" xlink:to="loc_us-gaap_DerivativeNotionalAmount_5163ae49-efff-4254-9bc1-b5eafc3636ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeRemainingMaturity1_c831fd9a-5b0c-4375-bd2c-5c894037999a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeRemainingMaturity1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ea2fb19a-04fb-4a81-8d52-536dba86de3c" xlink:to="loc_us-gaap_DerivativeRemainingMaturity1_c831fd9a-5b0c-4375-bd2c-5c894037999a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DerivativeNotionalAmountGold_435bbcd9-b57c-43e1-9b41-77582763387d" xlink:href="sig-20211030.xsd#sig_DerivativeNotionalAmountGold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ea2fb19a-04fb-4a81-8d52-536dba86de3c" xlink:to="loc_sig_DerivativeNotionalAmountGold_435bbcd9-b57c-43e1-9b41-77582763387d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_1864d072-58b7-4a52-a071-280ef8bd2ba5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_ea2fb19a-04fb-4a81-8d52-536dba86de3c" xlink:to="loc_us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths_1864d072-58b7-4a52-a071-280ef8bd2ba5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_001baba0-fb48-465d-89c3-47d7135eb743" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_ea2fb19a-04fb-4a81-8d52-536dba86de3c" xlink:to="loc_us-gaap_DerivativeTable_001baba0-fb48-465d-89c3-47d7135eb743" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_9bdf7ada-8612-4529-bfe5-ffa0701e3591" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_001baba0-fb48-465d-89c3-47d7135eb743" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_9bdf7ada-8612-4529-bfe5-ffa0701e3591" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_9bdf7ada-8612-4529-bfe5-ffa0701e3591_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_9bdf7ada-8612-4529-bfe5-ffa0701e3591" xlink:to="loc_us-gaap_HedgingRelationshipDomain_9bdf7ada-8612-4529-bfe5-ffa0701e3591_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_8458b5f6-f202-40fa-acd6-8654d980bf08" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_9bdf7ada-8612-4529-bfe5-ffa0701e3591" xlink:to="loc_us-gaap_HedgingRelationshipDomain_8458b5f6-f202-40fa-acd6-8654d980bf08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_21d41eae-508b-4301-a320-28f72f531419" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_8458b5f6-f202-40fa-acd6-8654d980bf08" xlink:to="loc_us-gaap_CashFlowHedgingMember_21d41eae-508b-4301-a320-28f72f531419" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_dc88893d-61ea-4e9b-bd57-1f7ad3ce54be" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_001baba0-fb48-465d-89c3-47d7135eb743" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_dc88893d-61ea-4e9b-bd57-1f7ad3ce54be" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_dc88893d-61ea-4e9b-bd57-1f7ad3ce54be_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_dc88893d-61ea-4e9b-bd57-1f7ad3ce54be" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_dc88893d-61ea-4e9b-bd57-1f7ad3ce54be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_6f078215-a08a-4907-8fd1-f5efa5dc636f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_dc88893d-61ea-4e9b-bd57-1f7ad3ce54be" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_6f078215-a08a-4907-8fd1-f5efa5dc636f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_eb0a17e9-80fd-4bc3-abdf-aa21d5d8eb71" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_6f078215-a08a-4907-8fd1-f5efa5dc636f" xlink:to="loc_us-gaap_ForeignExchangeContractMember_eb0a17e9-80fd-4bc3-abdf-aa21d5d8eb71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_067a3038-9210-4fb6-b464-98f7d158ce62" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_001baba0-fb48-465d-89c3-47d7135eb743" xlink:to="loc_us-gaap_HedgingDesignationAxis_067a3038-9210-4fb6-b464-98f7d158ce62" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_067a3038-9210-4fb6-b464-98f7d158ce62_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_067a3038-9210-4fb6-b464-98f7d158ce62" xlink:to="loc_us-gaap_HedgingDesignationDomain_067a3038-9210-4fb6-b464-98f7d158ce62_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_f4977623-9030-4523-ac4d-c0944f82ae03" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_067a3038-9210-4fb6-b464-98f7d158ce62" xlink:to="loc_us-gaap_HedgingDesignationDomain_f4977623-9030-4523-ac4d-c0944f82ae03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_8e532883-39ff-445c-8eaf-840116946bec" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_f4977623-9030-4523-ac4d-c0944f82ae03" xlink:to="loc_us-gaap_NondesignatedMember_8e532883-39ff-445c-8eaf-840116946bec" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/DerivativesFairValueofPresentationofDerivativeAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#DerivativesFairValueofPresentationofDerivativeAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/DerivativesFairValueofPresentationofDerivativeAssetsandLiabilitiesDetails" xlink:type="extended" id="i6868ab705aca4400ad3bcfb84bb7a2da_DerivativesFairValueofPresentationofDerivativeAssetsandLiabilitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_6fe579ab-2638-4dfc-beba-3e764a614fe0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_d998fff6-8174-4ea8-9ea2-0429630e4c1f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6fe579ab-2638-4dfc-beba-3e764a614fe0" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_d998fff6-8174-4ea8-9ea2-0429630e4c1f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_c258c4d3-bd12-4893-951b-e50285be7f54" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6fe579ab-2638-4dfc-beba-3e764a614fe0" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_c258c4d3-bd12-4893-951b-e50285be7f54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_555e0838-e066-4229-abbb-938b356cefe6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_6fe579ab-2638-4dfc-beba-3e764a614fe0" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_555e0838-e066-4229-abbb-938b356cefe6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_d626c683-f9cb-4112-91ec-3f7529d327cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_555e0838-e066-4229-abbb-938b356cefe6" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_d626c683-f9cb-4112-91ec-3f7529d327cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_d626c683-f9cb-4112-91ec-3f7529d327cc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_d626c683-f9cb-4112-91ec-3f7529d327cc" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_d626c683-f9cb-4112-91ec-3f7529d327cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_f05f3fa4-b531-4317-a08e-4bd0e3d8f34d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_d626c683-f9cb-4112-91ec-3f7529d327cc" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_f05f3fa4-b531-4317-a08e-4bd0e3d8f34d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_886a00e8-a2fa-4bf1-afb5-22a64e4b92a5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f05f3fa4-b531-4317-a08e-4bd0e3d8f34d" xlink:to="loc_us-gaap_ForeignExchangeContractMember_886a00e8-a2fa-4bf1-afb5-22a64e4b92a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_5c7fcf69-b45e-451f-b4a8-80672d02bc12" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f05f3fa4-b531-4317-a08e-4bd0e3d8f34d" xlink:to="loc_us-gaap_CommodityContractMember_5c7fcf69-b45e-451f-b4a8-80672d02bc12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_478fd35b-0fed-4009-924b-763df43b54e1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_555e0838-e066-4229-abbb-938b356cefe6" xlink:to="loc_us-gaap_HedgingDesignationAxis_478fd35b-0fed-4009-924b-763df43b54e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_478fd35b-0fed-4009-924b-763df43b54e1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_478fd35b-0fed-4009-924b-763df43b54e1" xlink:to="loc_us-gaap_HedgingDesignationDomain_478fd35b-0fed-4009-924b-763df43b54e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_4ade8982-c3c6-45b3-b516-c2e06382db01" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_478fd35b-0fed-4009-924b-763df43b54e1" xlink:to="loc_us-gaap_HedgingDesignationDomain_4ade8982-c3c6-45b3-b516-c2e06382db01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_cebfb6f1-bdbe-4dc0-b248-6f6ceeb13db8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_4ade8982-c3c6-45b3-b516-c2e06382db01" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_cebfb6f1-bdbe-4dc0-b248-6f6ceeb13db8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_9879e6a0-cf62-46b8-a21b-ea5ae8ed7d7e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_4ade8982-c3c6-45b3-b516-c2e06382db01" xlink:to="loc_us-gaap_NondesignatedMember_9879e6a0-cf62-46b8-a21b-ea5ae8ed7d7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_4458c9ec-4e5c-4f8a-9476-936befec589e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_555e0838-e066-4229-abbb-938b356cefe6" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_4458c9ec-4e5c-4f8a-9476-936befec589e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_4458c9ec-4e5c-4f8a-9476-936befec589e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_4458c9ec-4e5c-4f8a-9476-936befec589e" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_4458c9ec-4e5c-4f8a-9476-936befec589e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_ab39f961-2c53-48f3-9ed1-dff5d40139ba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_4458c9ec-4e5c-4f8a-9476-936befec589e" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_ab39f961-2c53-48f3-9ed1-dff5d40139ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentAssetsMember_7f128ff6-e758-491b-9c44-c720df2df51d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_ab39f961-2c53-48f3-9ed1-dff5d40139ba" xlink:to="loc_us-gaap_OtherCurrentAssetsMember_7f128ff6-e758-491b-9c44-c720df2df51d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember_4359b95d-e3ee-4a50-a3b4-8300d4cfb7e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherCurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_ab39f961-2c53-48f3-9ed1-dff5d40139ba" xlink:to="loc_us-gaap_OtherCurrentLiabilitiesMember_4359b95d-e3ee-4a50-a3b4-8300d4cfb7e5" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/DerivativesDerivativeInstrumentsDesignatedasCashFlowHedgesinOCIDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#DerivativesDerivativeInstrumentsDesignatedasCashFlowHedgesinOCIDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/DerivativesDerivativeInstrumentsDesignatedasCashFlowHedgesinOCIDetails" xlink:type="extended" id="i6f9d086b028746b2979be9d576605926_DerivativesDerivativeInstrumentsDesignatedasCashFlowHedgesinOCIDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_8d36150c-31d9-4bd8-9837-917a3114b586" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_MovementinAccumulatedOtherComprehensiveIncomeRollForward_47aa9c01-3caa-407f-98bc-c6887bbbedc2" xlink:href="sig-20211030.xsd#sig_MovementinAccumulatedOtherComprehensiveIncomeRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_8d36150c-31d9-4bd8-9837-917a3114b586" xlink:to="loc_sig_MovementinAccumulatedOtherComprehensiveIncomeRollForward_47aa9c01-3caa-407f-98bc-c6887bbbedc2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1_f075d8da-e83d-48b9-8b7f-53bc1d91c69b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sig_MovementinAccumulatedOtherComprehensiveIncomeRollForward_47aa9c01-3caa-407f-98bc-c6887bbbedc2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1_f075d8da-e83d-48b9-8b7f-53bc1d91c69b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_275e20a5-bce4-475e-a973-d2a7a873d3c7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sig_MovementinAccumulatedOtherComprehensiveIncomeRollForward_47aa9c01-3caa-407f-98bc-c6887bbbedc2" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_275e20a5-bce4-475e-a973-d2a7a873d3c7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_3bfeaa47-30dc-4f0f-801c-6f5da74f7490" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_sig_MovementinAccumulatedOtherComprehensiveIncomeRollForward_47aa9c01-3caa-407f-98bc-c6887bbbedc2" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_3bfeaa47-30dc-4f0f-801c-6f5da74f7490" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1_10faa4cb-7d0f-4a38-ac81-0ad069e1d65a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossBeforeTax1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_80feb74b-3cd1-4162-988d-6f3308822ed5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_8d36150c-31d9-4bd8-9837-917a3114b586" xlink:to="loc_us-gaap_DerivativeTable_80feb74b-3cd1-4162-988d-6f3308822ed5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_b09695c3-b998-4800-889a-229163ed91ba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_80feb74b-3cd1-4162-988d-6f3308822ed5" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_b09695c3-b998-4800-889a-229163ed91ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_b09695c3-b998-4800-889a-229163ed91ba_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_b09695c3-b998-4800-889a-229163ed91ba" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_b09695c3-b998-4800-889a-229163ed91ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_dedca539-613d-4b75-9e59-7f9e33c4ddd0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_b09695c3-b998-4800-889a-229163ed91ba" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_dedca539-613d-4b75-9e59-7f9e33c4ddd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_90bcca13-ee6a-460b-9b28-af7e2977ac6e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_dedca539-613d-4b75-9e59-7f9e33c4ddd0" xlink:to="loc_us-gaap_CostOfSalesMember_90bcca13-ee6a-460b-9b28-af7e2977ac6e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseMember_9bbc93ea-4b5b-43e1-92c4-e47c0d4eada2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherOperatingIncomeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_dedca539-613d-4b75-9e59-7f9e33c4ddd0" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseMember_9bbc93ea-4b5b-43e1-92c4-e47c0d4eada2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_5370a86a-5ef2-4687-a64d-c773652c73f4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_80feb74b-3cd1-4162-988d-6f3308822ed5" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_5370a86a-5ef2-4687-a64d-c773652c73f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_5370a86a-5ef2-4687-a64d-c773652c73f4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_5370a86a-5ef2-4687-a64d-c773652c73f4" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_5370a86a-5ef2-4687-a64d-c773652c73f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_caae79df-1c50-48e7-bfef-5efda60a513e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_5370a86a-5ef2-4687-a64d-c773652c73f4" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_caae79df-1c50-48e7-bfef-5efda60a513e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_76eb2928-b4be-4cca-8b3d-90dd1318220f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_caae79df-1c50-48e7-bfef-5efda60a513e" xlink:to="loc_us-gaap_ForeignExchangeContractMember_76eb2928-b4be-4cca-8b3d-90dd1318220f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_af2080bf-7738-4ddb-b9f4-302378becc8f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_caae79df-1c50-48e7-bfef-5efda60a513e" xlink:to="loc_us-gaap_CommodityContractMember_af2080bf-7738-4ddb-b9f4-302378becc8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_0387315f-38eb-4e19-8910-2b9c9cda9c3e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_80feb74b-3cd1-4162-988d-6f3308822ed5" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_0387315f-38eb-4e19-8910-2b9c9cda9c3e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_0387315f-38eb-4e19-8910-2b9c9cda9c3e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_0387315f-38eb-4e19-8910-2b9c9cda9c3e" xlink:to="loc_us-gaap_HedgingRelationshipDomain_0387315f-38eb-4e19-8910-2b9c9cda9c3e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_7cbf7f64-fd9b-4d45-a7cb-77d88b23ea91" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_0387315f-38eb-4e19-8910-2b9c9cda9c3e" xlink:to="loc_us-gaap_HedgingRelationshipDomain_7cbf7f64-fd9b-4d45-a7cb-77d88b23ea91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_3a516448-5313-443e-b9b2-0b1fc086083c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_7cbf7f64-fd9b-4d45-a7cb-77d88b23ea91" xlink:to="loc_us-gaap_CashFlowHedgingMember_3a516448-5313-443e-b9b2-0b1fc086083c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/DerivativesDerivativesnotDesignatedasHedgingInstrumentsDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#DerivativesDerivativesnotDesignatedasHedgingInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/DerivativesDerivativesnotDesignatedasHedgingInstrumentsDetails" xlink:type="extended" id="i1460e04b489a4a14bf674d38da59efea_DerivativesDerivativesnotDesignatedasHedgingInstrumentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_a7b5457d-e275-4c0b-b3fd-60dc44a50afe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_e7f3f731-7f79-4063-9d50-01acd2c03ad0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_a7b5457d-e275-4c0b-b3fd-60dc44a50afe" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_e7f3f731-7f79-4063-9d50-01acd2c03ad0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_31eded33-5cfa-43a5-be78-33af37b32c83" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_a7b5457d-e275-4c0b-b3fd-60dc44a50afe" xlink:to="loc_us-gaap_DerivativeTable_31eded33-5cfa-43a5-be78-33af37b32c83" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_ef7da2f9-f6ba-44c8-b6b0-c4db8fb540ff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_31eded33-5cfa-43a5-be78-33af37b32c83" xlink:to="loc_us-gaap_HedgingDesignationAxis_ef7da2f9-f6ba-44c8-b6b0-c4db8fb540ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_ef7da2f9-f6ba-44c8-b6b0-c4db8fb540ff_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_ef7da2f9-f6ba-44c8-b6b0-c4db8fb540ff" xlink:to="loc_us-gaap_HedgingDesignationDomain_ef7da2f9-f6ba-44c8-b6b0-c4db8fb540ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_c40a29ef-5a33-4611-89d0-2b5f1a3d1b76" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_ef7da2f9-f6ba-44c8-b6b0-c4db8fb540ff" xlink:to="loc_us-gaap_HedgingDesignationDomain_c40a29ef-5a33-4611-89d0-2b5f1a3d1b76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_03479f0e-c13d-4c1c-a7de-9ad1462aae16" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_c40a29ef-5a33-4611-89d0-2b5f1a3d1b76" xlink:to="loc_us-gaap_NondesignatedMember_03479f0e-c13d-4c1c-a7de-9ad1462aae16" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_b4d80a63-e1a3-42ff-84dc-31de930ec73a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_31eded33-5cfa-43a5-be78-33af37b32c83" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_b4d80a63-e1a3-42ff-84dc-31de930ec73a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_b4d80a63-e1a3-42ff-84dc-31de930ec73a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_b4d80a63-e1a3-42ff-84dc-31de930ec73a" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_b4d80a63-e1a3-42ff-84dc-31de930ec73a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_046bef13-b573-4e65-82c1-69b538c1c3b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_b4d80a63-e1a3-42ff-84dc-31de930ec73a" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_046bef13-b573-4e65-82c1-69b538c1c3b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_8b7bb73d-f8d0-45d5-8a51-d267049acf30" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_046bef13-b573-4e65-82c1-69b538c1c3b8" xlink:to="loc_us-gaap_ForeignExchangeContractMember_8b7bb73d-f8d0-45d5-8a51-d267049acf30" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_e177b264-c3a3-430e-9ad8-353c063c6af5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_31eded33-5cfa-43a5-be78-33af37b32c83" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_e177b264-c3a3-430e-9ad8-353c063c6af5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_e177b264-c3a3-430e-9ad8-353c063c6af5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e177b264-c3a3-430e-9ad8-353c063c6af5" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_e177b264-c3a3-430e-9ad8-353c063c6af5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_39457b1a-826b-4875-bfb5-d7185c5c226d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e177b264-c3a3-430e-9ad8-353c063c6af5" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_39457b1a-826b-4875-bfb5-d7185c5c226d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseMember_55026cf5-927e-4f06-8609-d1be52f49a1c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherOperatingIncomeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_39457b1a-826b-4875-bfb5-d7185c5c226d" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseMember_55026cf5-927e-4f06-8609-d1be52f49a1c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/FairvaluemeasurementFairValueofAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#FairvaluemeasurementFairValueofAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/FairvaluemeasurementFairValueofAssetsandLiabilitiesDetails" xlink:type="extended" id="ic7dd7b5b2c1e4aa295b2e18dfc5046c6_FairvaluemeasurementFairValueofAssetsandLiabilitiesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_fa8a3750-168a-428a-b65c-f3d65bd53841" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_4d3b56a4-5f47-4513-b04b-d700107cecc6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_fa8a3750-168a-428a-b65c-f3d65bd53841" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_4d3b56a4-5f47-4513-b04b-d700107cecc6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_85682ac0-3583-4026-aca4-73f1f201a89b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_fa8a3750-168a-428a-b65c-f3d65bd53841" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_85682ac0-3583-4026-aca4-73f1f201a89b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_41d88a8f-2c2d-436e-bf2c-27af6f6ba457" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_fa8a3750-168a-428a-b65c-f3d65bd53841" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_41d88a8f-2c2d-436e-bf2c-27af6f6ba457" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_94ff0994-3882-4db8-b18c-ebb9bf28b7d2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_41d88a8f-2c2d-436e-bf2c-27af6f6ba457" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_94ff0994-3882-4db8-b18c-ebb9bf28b7d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_94ff0994-3882-4db8-b18c-ebb9bf28b7d2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_94ff0994-3882-4db8-b18c-ebb9bf28b7d2" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_94ff0994-3882-4db8-b18c-ebb9bf28b7d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_18d73e05-e4c8-4ba1-9d27-ba137d9367c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_94ff0994-3882-4db8-b18c-ebb9bf28b7d2" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_18d73e05-e4c8-4ba1-9d27-ba137d9367c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_6ea490be-5064-4194-b1fb-0ab95d50bfa7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_18d73e05-e4c8-4ba1-9d27-ba137d9367c3" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_6ea490be-5064-4194-b1fb-0ab95d50bfa7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_dffe611f-39fc-4daf-bd75-c497ce34f7dc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_6ea490be-5064-4194-b1fb-0ab95d50bfa7" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_dffe611f-39fc-4daf-bd75-c497ce34f7dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_d659a69d-b673-4115-bc9b-d13a5c1cac6d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_41d88a8f-2c2d-436e-bf2c-27af6f6ba457" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_d659a69d-b673-4115-bc9b-d13a5c1cac6d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_d659a69d-b673-4115-bc9b-d13a5c1cac6d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_d659a69d-b673-4115-bc9b-d13a5c1cac6d" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_d659a69d-b673-4115-bc9b-d13a5c1cac6d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_323e3f49-3361-4649-b74b-a29f62c0e9d1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_d659a69d-b673-4115-bc9b-d13a5c1cac6d" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_323e3f49-3361-4649-b74b-a29f62c0e9d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_e0a07e4a-385d-4da8-9fb7-93c25effa37b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_323e3f49-3361-4649-b74b-a29f62c0e9d1" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_e0a07e4a-385d-4da8-9fb7-93c25effa37b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_31db1b20-4c38-4821-80b8-b0b3354dfe6f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_323e3f49-3361-4649-b74b-a29f62c0e9d1" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_31db1b20-4c38-4821-80b8-b0b3354dfe6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_291161b6-a543-420f-ac5a-ba2618544f81" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_41d88a8f-2c2d-436e-bf2c-27af6f6ba457" xlink:to="loc_us-gaap_FinancialInstrumentAxis_291161b6-a543-420f-ac5a-ba2618544f81" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_291161b6-a543-420f-ac5a-ba2618544f81_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_291161b6-a543-420f-ac5a-ba2618544f81" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_291161b6-a543-420f-ac5a-ba2618544f81_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ee5ef2a9-8a84-4d16-94ae-90e97b836d4f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_291161b6-a543-420f-ac5a-ba2618544f81" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ee5ef2a9-8a84-4d16-94ae-90e97b836d4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasurySecuritiesMember_b7259349-9e7d-4b47-8fdd-77455e4c9a94" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_USTreasurySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ee5ef2a9-8a84-4d16-94ae-90e97b836d4f" xlink:to="loc_us-gaap_USTreasurySecuritiesMember_b7259349-9e7d-4b47-8fdd-77455e4c9a94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_80f1eb52-b08a-481d-bfca-780dce13afa7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ee5ef2a9-8a84-4d16-94ae-90e97b836d4f" xlink:to="loc_us-gaap_ForeignExchangeContractMember_80f1eb52-b08a-481d-bfca-780dce13afa7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_7cee8e7f-6202-41f7-b658-7e359a2be7a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ee5ef2a9-8a84-4d16-94ae-90e97b836d4f" xlink:to="loc_us-gaap_CommodityContractMember_7cee8e7f-6202-41f7-b658-7e359a2be7a1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_b61851a9-6f3b-4f69-84fd-60c1b3e59907" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ee5ef2a9-8a84-4d16-94ae-90e97b836d4f" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_b61851a9-6f3b-4f69-84fd-60c1b3e59907" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_ce4098da-98c7-4960-80f4-7b3bd5d1eafe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ee5ef2a9-8a84-4d16-94ae-90e97b836d4f" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_ce4098da-98c7-4960-80f4-7b3bd5d1eafe" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/FairvaluemeasurementOutstandingDebtDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#FairvaluemeasurementOutstandingDebtDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/FairvaluemeasurementOutstandingDebtDetails" xlink:type="extended" id="if9461a0fc1684db98d2d9d4067d63026_FairvaluemeasurementOutstandingDebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_eea55108-391c-4d22-9d56-75fada336370" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_caf3b65e-cd22-4c6b-981c-5d902d00443e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_eea55108-391c-4d22-9d56-75fada336370" xlink:to="loc_us-gaap_DebtInstrumentFairValue_caf3b65e-cd22-4c6b-981c-5d902d00443e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_df7b64a6-8a0c-4c53-831f-37ac71e64a48" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_eea55108-391c-4d22-9d56-75fada336370" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_df7b64a6-8a0c-4c53-831f-37ac71e64a48" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_54474a58-87d4-4caa-8836-3d1788153905" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_df7b64a6-8a0c-4c53-831f-37ac71e64a48" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_54474a58-87d4-4caa-8836-3d1788153905" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_54474a58-87d4-4caa-8836-3d1788153905_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_54474a58-87d4-4caa-8836-3d1788153905" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_54474a58-87d4-4caa-8836-3d1788153905_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_3958ca12-3a24-406a-b9a7-63940882cc25" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_54474a58-87d4-4caa-8836-3d1788153905" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_3958ca12-3a24-406a-b9a7-63940882cc25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_b47b6db1-6815-4d5f-8e8d-ff9d29e80387" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_3958ca12-3a24-406a-b9a7-63940882cc25" xlink:to="loc_us-gaap_SeniorNotesMember_b47b6db1-6815-4d5f-8e8d-ff9d29e80387" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_TermLoanMember_9d4e0b4e-f713-4333-be4b-7252800b9f42" xlink:href="sig-20211030.xsd#sig_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_3958ca12-3a24-406a-b9a7-63940882cc25" xlink:to="loc_sig_TermLoanMember_9d4e0b4e-f713-4333-be4b-7252800b9f42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_75afae11-6019-4466-b960-6db7163a2330" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_df7b64a6-8a0c-4c53-831f-37ac71e64a48" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_75afae11-6019-4466-b960-6db7163a2330" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_75afae11-6019-4466-b960-6db7163a2330_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_75afae11-6019-4466-b960-6db7163a2330" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_75afae11-6019-4466-b960-6db7163a2330_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7bbc899f-d032-4c79-8b53-2d575cf257d4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_75afae11-6019-4466-b960-6db7163a2330" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7bbc899f-d032-4c79-8b53-2d575cf257d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_28cf84eb-b5f8-4396-a573-379cf569aaab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7bbc899f-d032-4c79-8b53-2d575cf257d4" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_28cf84eb-b5f8-4396-a573-379cf569aaab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_d5bc873b-5d46-4b8e-8ccb-411990134c8b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_df7b64a6-8a0c-4c53-831f-37ac71e64a48" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_d5bc873b-5d46-4b8e-8ccb-411990134c8b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_d5bc873b-5d46-4b8e-8ccb-411990134c8b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_d5bc873b-5d46-4b8e-8ccb-411990134c8b" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_d5bc873b-5d46-4b8e-8ccb-411990134c8b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_a6892cdd-824c-410c-95dd-dbcb9b3c1154" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_d5bc873b-5d46-4b8e-8ccb-411990134c8b" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_a6892cdd-824c-410c-95dd-dbcb9b3c1154" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_36f24c2c-e75c-43b0-9b19-17d407948cdc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_a6892cdd-824c-410c-95dd-dbcb9b3c1154" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_36f24c2c-e75c-43b0-9b19-17d407948cdc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_8a52ba11-1ed6-4565-a28f-e66a78108d46" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_a6892cdd-824c-410c-95dd-dbcb9b3c1154" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_8a52ba11-1ed6-4565-a28f-e66a78108d46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_28f5ff5f-6e58-4f95-b82a-0c777c5c0e83" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_a6892cdd-824c-410c-95dd-dbcb9b3c1154" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_28f5ff5f-6e58-4f95-b82a-0c777c5c0e83" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/LoansoverdraftsandlongtermdebtLoansoverdraftsandlongtermdebtDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#LoansoverdraftsandlongtermdebtLoansoverdraftsandlongtermdebtDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/LoansoverdraftsandlongtermdebtLoansoverdraftsandlongtermdebtDetails" xlink:type="extended" id="i4cea5107bbfc46099cbd4b3eeb77f9fb_LoansoverdraftsandlongtermdebtLoansoverdraftsandlongtermdebtDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_b9fc8364-4ee5-4bb9-bb07-66563fd5569d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_ed18429d-f78d-42c9-917c-43a5fa31d80c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9fc8364-4ee5-4bb9-bb07-66563fd5569d" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_ed18429d-f78d-42c9-917c-43a5fa31d80c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtCurrent_d9c3e38e-b0da-4b1c-aa25-a20636f90c0a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9fc8364-4ee5-4bb9-bb07-66563fd5569d" xlink:to="loc_us-gaap_DebtCurrent_d9c3e38e-b0da-4b1c-aa25-a20636f90c0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_8b82306c-c0c6-4e88-98d7-c9593a53a914" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9fc8364-4ee5-4bb9-bb07-66563fd5569d" xlink:to="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_8b82306c-c0c6-4e88-98d7-c9593a53a914" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_567b86e5-f592-4781-948b-6d37fa51eb2d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9fc8364-4ee5-4bb9-bb07-66563fd5569d" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_567b86e5-f592-4781-948b-6d37fa51eb2d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_8f459dc0-7c5d-49b1-aca7-5df52762c0c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b9fc8364-4ee5-4bb9-bb07-66563fd5569d" xlink:to="loc_us-gaap_DebtInstrumentTable_8f459dc0-7c5d-49b1-aca7-5df52762c0c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_fb8ee661-6068-4a79-a778-0d996964d75e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8f459dc0-7c5d-49b1-aca7-5df52762c0c9" xlink:to="loc_us-gaap_DebtInstrumentAxis_fb8ee661-6068-4a79-a778-0d996964d75e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_fb8ee661-6068-4a79-a778-0d996964d75e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_fb8ee661-6068-4a79-a778-0d996964d75e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_fb8ee661-6068-4a79-a778-0d996964d75e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c18a3607-66c4-49da-a462-7b0cc2d575d6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_fb8ee661-6068-4a79-a778-0d996964d75e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c18a3607-66c4-49da-a462-7b0cc2d575d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SeniorUnsecuredNotesDuein2024Member_4e71ae9c-76ef-4792-be19-1cdc202d32b7" xlink:href="sig-20211030.xsd#sig_SeniorUnsecuredNotesDuein2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c18a3607-66c4-49da-a462-7b0cc2d575d6" xlink:to="loc_sig_SeniorUnsecuredNotesDuein2024Member_4e71ae9c-76ef-4792-be19-1cdc202d32b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SeniorAssetBasedCreditFacilityMember_701c465e-c7e5-4d5f-a8d7-0d3b6453e700" xlink:href="sig-20211030.xsd#sig_SeniorAssetBasedCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c18a3607-66c4-49da-a462-7b0cc2d575d6" xlink:to="loc_sig_SeniorAssetBasedCreditFacilityMember_701c465e-c7e5-4d5f-a8d7-0d3b6453e700" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_d75d7c33-c25f-4e9a-9039-0965af2aac96" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8f459dc0-7c5d-49b1-aca7-5df52762c0c9" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_d75d7c33-c25f-4e9a-9039-0965af2aac96" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_d75d7c33-c25f-4e9a-9039-0965af2aac96_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_d75d7c33-c25f-4e9a-9039-0965af2aac96" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_d75d7c33-c25f-4e9a-9039-0965af2aac96_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7b451569-1c37-4b43-8cc5-57d72da49f9b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_d75d7c33-c25f-4e9a-9039-0965af2aac96" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_7b451569-1c37-4b43-8cc5-57d72da49f9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_4541c10d-1cfe-4517-ade5-173bbffd034c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_7b451569-1c37-4b43-8cc5-57d72da49f9b" xlink:to="loc_us-gaap_SeniorNotesMember_4541c10d-1cfe-4517-ade5-173bbffd034c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_595a5710-942b-4394-9555-e242ad83b30c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_7b451569-1c37-4b43-8cc5-57d72da49f9b" xlink:to="loc_us-gaap_LineOfCreditMember_595a5710-942b-4394-9555-e242ad83b30c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_OtherLoansandBankOverdraftMember_fed6bb0c-8b6c-4d3f-9fea-f11b37a7e7e8" xlink:href="sig-20211030.xsd#sig_OtherLoansandBankOverdraftMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_7b451569-1c37-4b43-8cc5-57d72da49f9b" xlink:to="loc_sig_OtherLoansandBankOverdraftMember_fed6bb0c-8b6c-4d3f-9fea-f11b37a7e7e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_d4d3767b-f917-4fdb-b7a6-9a7779227bd2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8f459dc0-7c5d-49b1-aca7-5df52762c0c9" xlink:to="loc_us-gaap_CreditFacilityAxis_d4d3767b-f917-4fdb-b7a6-9a7779227bd2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_d4d3767b-f917-4fdb-b7a6-9a7779227bd2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_d4d3767b-f917-4fdb-b7a6-9a7779227bd2" xlink:to="loc_us-gaap_CreditFacilityDomain_d4d3767b-f917-4fdb-b7a6-9a7779227bd2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_55118fe0-86c0-49c3-bf05-2e8910cef51b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_d4d3767b-f917-4fdb-b7a6-9a7779227bd2" xlink:to="loc_us-gaap_CreditFacilityDomain_55118fe0-86c0-49c3-bf05-2e8910cef51b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_0e64af6b-14d3-463f-8f9c-7180526d7dad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_55118fe0-86c0-49c3-bf05-2e8910cef51b" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_0e64af6b-14d3-463f-8f9c-7180526d7dad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_TermLoanFacilityMember_dd2c1ca6-8941-43a8-878e-efac6de6eff7" xlink:href="sig-20211030.xsd#sig_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_55118fe0-86c0-49c3-bf05-2e8910cef51b" xlink:to="loc_sig_TermLoanFacilityMember_dd2c1ca6-8941-43a8-878e-efac6de6eff7" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/LoansoverdraftsandlongtermdebtAdditionalInformationDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#LoansoverdraftsandlongtermdebtAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/LoansoverdraftsandlongtermdebtAdditionalInformationDetails" xlink:type="extended" id="ife58fc9a19474dceacb1dab0457dccb7_LoansoverdraftsandlongtermdebtAdditionalInformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_782cd58f-cbcb-4b4b-986a-1221b3154195" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_782cd58f-cbcb-4b4b-986a-1221b3154195" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1d65923e-c396-4a85-aee3-7241d6fcf2df" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1d65923e-c396-4a85-aee3-7241d6fcf2df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfSeniorDebt_10b9d1e2-0431-402e-b8db-819aa2bdbcce" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfSeniorDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_RepaymentsOfSeniorDebt_10b9d1e2-0431-402e-b8db-819aa2bdbcce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DebtInstrumentRedemptionPricePerOneThousandDollarsOfPrincipalAmountRedeemed_a8df6e29-3bb0-4e52-b7d4-f45d33acf405" xlink:href="sig-20211030.xsd#sig_DebtInstrumentRedemptionPricePerOneThousandDollarsOfPrincipalAmountRedeemed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_sig_DebtInstrumentRedemptionPricePerOneThousandDollarsOfPrincipalAmountRedeemed_a8df6e29-3bb0-4e52-b7d4-f45d33acf405" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnamortizedDebtIssuanceExpense_07220e76-77a3-47e6-8a3f-155c64316f72" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_UnamortizedDebtIssuanceExpense_07220e76-77a3-47e6-8a3f-155c64316f72" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_f9ed1af8-6828-4791-a272-8b521ccc5f3f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_f9ed1af8-6828-4791-a272-8b521ccc5f3f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_06ec492d-a11f-49e7-a962-210e80f50e2b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_06ec492d-a11f-49e7-a962-210e80f50e2b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_LineOfCreditFacilityAdditionalBorrowingCapacity_c232054d-5778-4276-8e5c-f076dbb0108f" xlink:href="sig-20211030.xsd#sig_LineOfCreditFacilityAdditionalBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_sig_LineOfCreditFacilityAdditionalBorrowingCapacity_c232054d-5778-4276-8e5c-f076dbb0108f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsGross_d7bb7515-4fc8-4024-8f47-0c29a490206e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredFinanceCostsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_DeferredFinanceCostsGross_d7bb7515-4fc8-4024-8f47-0c29a490206e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_2de49df0-fdee-4639-ac39-6bcd052357e8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_2de49df0-fdee-4639-ac39-6bcd052357e8" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_723364d6-d2f9-49ec-b761-77ae9047fd43" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_723364d6-d2f9-49ec-b761-77ae9047fd43" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_6e8499f7-378f-4c7c-94fa-421c98aac2fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_6e8499f7-378f-4c7c-94fa-421c98aac2fb" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DebtInstrumentCovenantMinimumCoverageRatio_adfacdd1-c1f4-4b39-a82b-b2cf50e71fea" xlink:href="sig-20211030.xsd#sig_DebtInstrumentCovenantMinimumCoverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_sig_DebtInstrumentCovenantMinimumCoverageRatio_adfacdd1-c1f4-4b39-a82b-b2cf50e71fea" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DebtCovenantFixedCovenantRatioThreshold_39ad0bfd-2f4f-4ab7-bd76-218550fe51ab" xlink:href="sig-20211030.xsd#sig_DebtCovenantFixedCovenantRatioThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_sig_DebtCovenantFixedCovenantRatioThreshold_39ad0bfd-2f4f-4ab7-bd76-218550fe51ab" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_c5b75d04-1971-4f10-a4c0-112ee6f159c0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_942d8582-af7e-48c2-9b7d-09960cf555e6" xlink:to="loc_us-gaap_DebtInstrumentTable_c5b75d04-1971-4f10-a4c0-112ee6f159c0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_beba70ac-156d-458d-9246-495063c5a7e0" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_c5b75d04-1971-4f10-a4c0-112ee6f159c0" xlink:to="loc_dei_LegalEntityAxis_beba70ac-156d-458d-9246-495063c5a7e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_beba70ac-156d-458d-9246-495063c5a7e0_default" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_beba70ac-156d-458d-9246-495063c5a7e0" xlink:to="loc_dei_EntityDomain_beba70ac-156d-458d-9246-495063c5a7e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_8ebc2957-60d6-4e3f-9db0-78e9531b8a0a" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_beba70ac-156d-458d-9246-495063c5a7e0" xlink:to="loc_dei_EntityDomain_8ebc2957-60d6-4e3f-9db0-78e9531b8a0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SignetUKFinanceplcMember_4843ccac-b7da-4728-889c-adb0364be95c" xlink:href="sig-20211030.xsd#sig_SignetUKFinanceplcMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8ebc2957-60d6-4e3f-9db0-78e9531b8a0a" xlink:to="loc_sig_SignetUKFinanceplcMember_4843ccac-b7da-4728-889c-adb0364be95c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_ca609a7a-2396-437b-a502-ac1cc1c9f786" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_c5b75d04-1971-4f10-a4c0-112ee6f159c0" xlink:to="loc_us-gaap_CreditFacilityAxis_ca609a7a-2396-437b-a502-ac1cc1c9f786" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_ca609a7a-2396-437b-a502-ac1cc1c9f786_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_ca609a7a-2396-437b-a502-ac1cc1c9f786" xlink:to="loc_us-gaap_CreditFacilityDomain_ca609a7a-2396-437b-a502-ac1cc1c9f786_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_cbe59acf-df7f-46fd-8c3d-49bb1fb66cba" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_ca609a7a-2396-437b-a502-ac1cc1c9f786" xlink:to="loc_us-gaap_CreditFacilityDomain_cbe59acf-df7f-46fd-8c3d-49bb1fb66cba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_a4406a23-773d-4cf0-9d27-e0be457ff474" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_cbe59acf-df7f-46fd-8c3d-49bb1fb66cba" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_a4406a23-773d-4cf0-9d27-e0be457ff474" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_TermLoanFacilityMember_5c416dc0-0825-4d31-8d2f-a8c665f7e680" xlink:href="sig-20211030.xsd#sig_TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_cbe59acf-df7f-46fd-8c3d-49bb1fb66cba" xlink:to="loc_sig_TermLoanFacilityMember_5c416dc0-0825-4d31-8d2f-a8c665f7e680" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_a3dd8c7b-8bf9-4e55-8123-53042de9965a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_c5b75d04-1971-4f10-a4c0-112ee6f159c0" xlink:to="loc_us-gaap_DebtInstrumentAxis_a3dd8c7b-8bf9-4e55-8123-53042de9965a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a3dd8c7b-8bf9-4e55-8123-53042de9965a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_a3dd8c7b-8bf9-4e55-8123-53042de9965a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a3dd8c7b-8bf9-4e55-8123-53042de9965a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_3f334712-a6db-4e4c-ae08-0439b5653622" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_a3dd8c7b-8bf9-4e55-8123-53042de9965a" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_3f334712-a6db-4e4c-ae08-0439b5653622" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SeniorUnsecuredNotesDuein2024Member_dd975ea9-02e8-4e53-8a49-0c2f4bd276d1" xlink:href="sig-20211030.xsd#sig_SeniorUnsecuredNotesDuein2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3f334712-a6db-4e4c-ae08-0439b5653622" xlink:to="loc_sig_SeniorUnsecuredNotesDuein2024Member_dd975ea9-02e8-4e53-8a49-0c2f4bd276d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SeniorAssetBasedCreditFacilityMember_aa748e9c-5386-47d1-8943-f0b47ab84745" xlink:href="sig-20211030.xsd#sig_SeniorAssetBasedCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_3f334712-a6db-4e4c-ae08-0439b5653622" xlink:to="loc_sig_SeniorAssetBasedCreditFacilityMember_aa748e9c-5386-47d1-8943-f0b47ab84745" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_661db4ae-3519-4973-a45e-20b55cb3e2cf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_c5b75d04-1971-4f10-a4c0-112ee6f159c0" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_661db4ae-3519-4973-a45e-20b55cb3e2cf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_661db4ae-3519-4973-a45e-20b55cb3e2cf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_661db4ae-3519-4973-a45e-20b55cb3e2cf" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_661db4ae-3519-4973-a45e-20b55cb3e2cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_46a64ce9-d55e-4d51-91a3-5dea2fe6a5bc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_661db4ae-3519-4973-a45e-20b55cb3e2cf" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_46a64ce9-d55e-4d51-91a3-5dea2fe6a5bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_9ae23e0d-f75c-41c3-a181-51515720fb7e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_46a64ce9-d55e-4d51-91a3-5dea2fe6a5bc" xlink:to="loc_us-gaap_SeniorNotesMember_9ae23e0d-f75c-41c3-a181-51515720fb7e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_ab69f801-79f8-497a-94b4-09dad3ed40b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_46a64ce9-d55e-4d51-91a3-5dea2fe6a5bc" xlink:to="loc_us-gaap_LineOfCreditMember_ab69f801-79f8-497a-94b4-09dad3ed40b0" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/CommitmentsandcontingenciesAdditionalinformationDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#CommitmentsandcontingenciesAdditionalinformationDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/CommitmentsandcontingenciesAdditionalinformationDetails" xlink:type="extended" id="ic7807e4378a54be599bb0f7db3520fde_CommitmentsandcontingenciesAdditionalinformationDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_22bedbb5-9ad0-416d-a13f-9d1ef0952576" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNumberOfPlaintiffs_4992420d-dee8-4b49-971c-263183459b7a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyNumberOfPlaintiffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22bedbb5-9ad0-416d-a13f-9d1ef0952576" xlink:to="loc_us-gaap_LossContingencyNumberOfPlaintiffs_4992420d-dee8-4b49-971c-263183459b7a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNewClaimsFiledNumber_537b90f8-634e-4d1a-91ef-6bf8164d73b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyNewClaimsFiledNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22bedbb5-9ad0-416d-a13f-9d1ef0952576" xlink:to="loc_us-gaap_LossContingencyNewClaimsFiledNumber_537b90f8-634e-4d1a-91ef-6bf8164d73b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_567f8b59-dc74-4f78-b742-0c7fc9b0e6e3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22bedbb5-9ad0-416d-a13f-9d1ef0952576" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedToOtherParty_567f8b59-dc74-4f78-b742-0c7fc9b0e6e3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossRelatedToLitigationSettlement_7318bdac-1892-4218-85e7-af28b03da793" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossRelatedToLitigationSettlement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22bedbb5-9ad0-416d-a13f-9d1ef0952576" xlink:to="loc_us-gaap_GainLossRelatedToLitigationSettlement_7318bdac-1892-4218-85e7-af28b03da793" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LegalFees_9bea1cf8-2348-4e21-8dae-7ece47cccd1b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LegalFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22bedbb5-9ad0-416d-a13f-9d1ef0952576" xlink:to="loc_us-gaap_LegalFees_9bea1cf8-2348-4e21-8dae-7ece47cccd1b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceRecoveries_b933d8f2-ea36-4d57-be90-25e83e0316d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InsuranceRecoveries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22bedbb5-9ad0-416d-a13f-9d1ef0952576" xlink:to="loc_us-gaap_InsuranceRecoveries_b933d8f2-ea36-4d57-be90-25e83e0316d9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_NumberofAnticipatedSettlements_7384e661-4c82-4fd9-a542-5bafb0c14f23" xlink:href="sig-20211030.xsd#sig_NumberofAnticipatedSettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_22bedbb5-9ad0-416d-a13f-9d1ef0952576" xlink:to="loc_sig_NumberofAnticipatedSettlements_7384e661-4c82-4fd9-a542-5bafb0c14f23" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_cbb5aa09-57d3-40d9-850e-e1077a02eb2b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_22bedbb5-9ad0-416d-a13f-9d1ef0952576" xlink:to="loc_us-gaap_LossContingenciesTable_cbb5aa09-57d3-40d9-850e-e1077a02eb2b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_e1cf1a56-0cd3-44c1-ba67-9adf5ae4b1af" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_cbb5aa09-57d3-40d9-850e-e1077a02eb2b" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_e1cf1a56-0cd3-44c1-ba67-9adf5ae4b1af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_e1cf1a56-0cd3-44c1-ba67-9adf5ae4b1af_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e1cf1a56-0cd3-44c1-ba67-9adf5ae4b1af" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_e1cf1a56-0cd3-44c1-ba67-9adf5ae4b1af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_d0b35090-7875-442a-a5a0-511fbf334b15" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e1cf1a56-0cd3-44c1-ba67-9adf5ae4b1af" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_d0b35090-7875-442a-a5a0-511fbf334b15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseMember_f1f10ba9-eb28-4a2f-8ea9-e86a3417810c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherOperatingIncomeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_d0b35090-7875-442a-a5a0-511fbf334b15" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseMember_f1f10ba9-eb28-4a2f-8ea9-e86a3417810c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_8fbcd5da-b7bd-4d61-a7f3-571fcae89b8a" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_cbb5aa09-57d3-40d9-850e-e1077a02eb2b" xlink:to="loc_srt_LitigationCaseAxis_8fbcd5da-b7bd-4d61-a7f3-571fcae89b8a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_8fbcd5da-b7bd-4d61-a7f3-571fcae89b8a_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_8fbcd5da-b7bd-4d61-a7f3-571fcae89b8a" xlink:to="loc_srt_LitigationCaseTypeDomain_8fbcd5da-b7bd-4d61-a7f3-571fcae89b8a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_32e2f43c-fd85-4895-bff1-6b5be8a7115e" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_8fbcd5da-b7bd-4d61-a7f3-571fcae89b8a" xlink:to="loc_srt_LitigationCaseTypeDomain_32e2f43c-fd85-4895-bff1-6b5be8a7115e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_EnvironmentalProtectionAgencyCollectiveActionMember_0cfa45a6-1a2b-4efc-b56b-e1bbe0f46962" xlink:href="sig-20211030.xsd#sig_EnvironmentalProtectionAgencyCollectiveActionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_32e2f43c-fd85-4895-bff1-6b5be8a7115e" xlink:to="loc_sig_EnvironmentalProtectionAgencyCollectiveActionMember_0cfa45a6-1a2b-4efc-b56b-e1bbe0f46962" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_ShareholderActionsMember_7a922641-c6c7-432e-bcb1-8f69dad80e7f" xlink:href="sig-20211030.xsd#sig_ShareholderActionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_32e2f43c-fd85-4895-bff1-6b5be8a7115e" xlink:to="loc_sig_ShareholderActionsMember_7a922641-c6c7-432e-bcb1-8f69dad80e7f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.signetjewelers.com/role/RetirementplansNarrativeDetails" xlink:type="simple" xlink:href="sig-20211030.xsd#RetirementplansNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.signetjewelers.com/role/RetirementplansNarrativeDetails" xlink:type="extended" id="i13a3f3f6579a4862b86abef74a1f704b_RetirementplansNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MultiemployerPlansLineItems_90f2ac37-81fa-4e3a-9a11-63cf194ec239" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MultiemployerPlansLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DefinedBenefitPlanNumberOfPensionSchemeMembers_c3278d3e-a9a8-4561-94af-44166160dc37" xlink:href="sig-20211030.xsd#sig_DefinedBenefitPlanNumberOfPensionSchemeMembers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MultiemployerPlansLineItems_90f2ac37-81fa-4e3a-9a11-63cf194ec239" xlink:to="loc_sig_DefinedBenefitPlanNumberOfPensionSchemeMembers_c3278d3e-a9a8-4561-94af-44166160dc37" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DefinedBenefitPlanExpectedFutureEmployerContributionsAmount_e466aa4f-dd67-475b-874c-cf321cde7829" xlink:href="sig-20211030.xsd#sig_DefinedBenefitPlanExpectedFutureEmployerContributionsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MultiemployerPlansLineItems_90f2ac37-81fa-4e3a-9a11-63cf194ec239" xlink:to="loc_sig_DefinedBenefitPlanExpectedFutureEmployerContributionsAmount_e466aa4f-dd67-475b-874c-cf321cde7829" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_DefinedBenefitPlanInitialContributionAmount_75a2f27b-7e25-4c5f-9338-de399e5d719b" xlink:href="sig-20211030.xsd#sig_DefinedBenefitPlanInitialContributionAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MultiemployerPlansLineItems_90f2ac37-81fa-4e3a-9a11-63cf194ec239" xlink:to="loc_sig_DefinedBenefitPlanInitialContributionAmount_75a2f27b-7e25-4c5f-9338-de399e5d719b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit_a250c61a-faf1-430c-a309-d57e73f0fecd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MultiemployerPlansLineItems_90f2ac37-81fa-4e3a-9a11-63cf194ec239" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLossImmediateRecognitionAsComponentInNetPeriodicBenefitCostCredit_a250c61a-faf1-430c-a309-d57e73f0fecd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_6da791e3-4980-4568-9d61-115773544dce" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MultiemployerPlansLineItems_90f2ac37-81fa-4e3a-9a11-63cf194ec239" xlink:to="loc_us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_6da791e3-4980-4568-9d61-115773544dce" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_31acb4f7-9c8f-4a61-a9fe-c7bd55ebc60c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MultiemployerPlansLineItems_90f2ac37-81fa-4e3a-9a11-63cf194ec239" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_31acb4f7-9c8f-4a61-a9fe-c7bd55ebc60c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_970bc5e3-2f1a-4b7b-9ba8-16fc577eac17" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MultiemployerPlansLineItems_90f2ac37-81fa-4e3a-9a11-63cf194ec239" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_970bc5e3-2f1a-4b7b-9ba8-16fc577eac17" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanTable_4863000e-b092-4cf4-adb7-e555a165c2d8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedContributionPlanTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MultiemployerPlansLineItems_90f2ac37-81fa-4e3a-9a11-63cf194ec239" xlink:to="loc_us-gaap_DefinedContributionPlanTable_4863000e-b092-4cf4-adb7-e555a165c2d8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_f6cf237f-3409-4fc8-a357-6bc05ef6c343" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedContributionPlanTable_4863000e-b092-4cf4-adb7-e555a165c2d8" xlink:to="loc_srt_RangeAxis_f6cf237f-3409-4fc8-a357-6bc05ef6c343" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f6cf237f-3409-4fc8-a357-6bc05ef6c343_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_f6cf237f-3409-4fc8-a357-6bc05ef6c343" xlink:to="loc_srt_RangeMember_f6cf237f-3409-4fc8-a357-6bc05ef6c343_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_39c47469-1807-408a-9bd1-7958e2b431cc" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_f6cf237f-3409-4fc8-a357-6bc05ef6c343" xlink:to="loc_srt_RangeMember_39c47469-1807-408a-9bd1-7958e2b431cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_f35d35b2-f0ee-4cab-82d9-d48df115ee94" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_39c47469-1807-408a-9bd1-7958e2b431cc" xlink:to="loc_srt_MinimumMember_f35d35b2-f0ee-4cab-82d9-d48df115ee94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_b4de6533-8fcb-4753-8b30-d15ace7d778f" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_39c47469-1807-408a-9bd1-7958e2b431cc" xlink:to="loc_srt_MaximumMember_b4de6533-8fcb-4753-8b30-d15ace7d778f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_51246c52-ae79-426a-9189-54d309dcf601" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedContributionPlanTable_4863000e-b092-4cf4-adb7-e555a165c2d8" xlink:to="loc_dei_LegalEntityAxis_51246c52-ae79-426a-9189-54d309dcf601" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_51246c52-ae79-426a-9189-54d309dcf601_default" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_51246c52-ae79-426a-9189-54d309dcf601" xlink:to="loc_dei_EntityDomain_51246c52-ae79-426a-9189-54d309dcf601_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_762103a7-7004-4f8f-9c6c-4a8c24825212" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_51246c52-ae79-426a-9189-54d309dcf601" xlink:to="loc_dei_EntityDomain_762103a7-7004-4f8f-9c6c-4a8c24825212" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_sig_SignetGroupLimitedMember_287057fa-375c-4ef0-b632-c6c20b6aed7b" xlink:href="sig-20211030.xsd#sig_SignetGroupLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_762103a7-7004-4f8f-9c6c-4a8c24825212" xlink:to="loc_sig_SignetGroupLimitedMember_287057fa-375c-4ef0-b632-c6c20b6aed7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_5fa80729-99e4-4d82-8e8e-6c0736da08c3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedContributionPlanTable_4863000e-b092-4cf4-adb7-e555a165c2d8" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_5fa80729-99e4-4d82-8e8e-6c0736da08c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5fa80729-99e4-4d82-8e8e-6c0736da08c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_5fa80729-99e4-4d82-8e8e-6c0736da08c3" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5fa80729-99e4-4d82-8e8e-6c0736da08c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_88c3be28-d0d8-4465-9fa0-474645228fc0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_5fa80729-99e4-4d82-8e8e-6c0736da08c3" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_88c3be28-d0d8-4465-9fa0-474645228fc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_bc4b02c7-b0af-4a13-8ccd-046f175f026c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_88c3be28-d0d8-4465-9fa0-474645228fc0" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_bc4b02c7-b0af-4a13-8ccd-046f175f026c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_ac91f217-8de4-4dce-9ffe-66c24f4b84e6" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedContributionPlanTable_4863000e-b092-4cf4-adb7-e555a165c2d8" xlink:to="loc_srt_StatementScenarioAxis_ac91f217-8de4-4dce-9ffe-66c24f4b84e6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_ac91f217-8de4-4dce-9ffe-66c24f4b84e6_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_ac91f217-8de4-4dce-9ffe-66c24f4b84e6" xlink:to="loc_srt_ScenarioUnspecifiedDomain_ac91f217-8de4-4dce-9ffe-66c24f4b84e6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_82c43820-d15c-44c2-ba9d-0b1977962d73" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_ac91f217-8de4-4dce-9ffe-66c24f4b84e6" xlink:to="loc_srt_ScenarioUnspecifiedDomain_82c43820-d15c-44c2-ba9d-0b1977962d73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_ecce841c-6428-4553-af3b-39de83da24ce" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_82c43820-d15c-44c2-ba9d-0b1977962d73" xlink:to="loc_srt_ScenarioForecastMember_ecce841c-6428-4553-af3b-39de83da24ce" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
