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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e464b-84b7-70d0-8220-f5af5ea546b7,g:7393c85b-b27c-488b-be66-17b902e4d1e1-->
<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.tillys.com/role/Cover" xlink:type="simple" xlink:href="tlys-20260502.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019e464b-8574-743d-9f0d-e70f4be6a47d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_DocumentInformationTable_019e464b-8574-743d-9f0d-e70f4be6a47d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-7237-991d-218a46299445" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019e464b-8574-743d-9f0d-e70f4be6a47d" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-7237-991d-218a46299445" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7237-991d-218a46299445_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-7237-991d-218a46299445" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7237-991d-218a46299445_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-8574-76e4-9a5b-8ce72406953a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-7237-991d-218a46299445" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-8574-76e4-9a5b-8ce72406953a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e464b-8574-7d21-b7f5-f7c83bcae96b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e464b-8574-76e4-9a5b-8ce72406953a" xlink:to="loc_us-gaap_CommonClassAMember_019e464b-8574-7d21-b7f5-f7c83bcae96b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019e464b-8574-70ca-8979-df871b781c83" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e464b-8574-76e4-9a5b-8ce72406953a" xlink:to="loc_us-gaap_CommonClassBMember_019e464b-8574-70ca-8979-df871b781c83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e464b-8574-7435-9791-8384f06495c9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_DocumentType_019e464b-8574-7435-9791-8384f06495c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019e464b-8574-71d1-9a57-119f7cc14c5c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_DocumentQuarterlyReport_019e464b-8574-71d1-9a57-119f7cc14c5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e464b-8574-7f83-91b4-8ce1fc31511e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_DocumentPeriodEndDate_019e464b-8574-7f83-91b4-8ce1fc31511e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019e464b-8574-755e-b88b-c3e31b28af75" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_DocumentTransitionReport_019e464b-8574-755e-b88b-c3e31b28af75" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e464b-8574-7211-84fb-577dc3888028" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityFileNumber_019e464b-8574-7211-84fb-577dc3888028" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e464b-8574-7684-88ec-529325c39947" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityRegistrantName_019e464b-8574-7684-88ec-529325c39947" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e464b-8574-79fb-914e-a1621f47811a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e464b-8574-79fb-914e-a1621f47811a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e464b-8574-7162-bd6b-615a172aac00" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e464b-8574-7162-bd6b-615a172aac00" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e464b-8574-7dd3-a7d2-1d286ec90502" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityAddressAddressLine1_019e464b-8574-7dd3-a7d2-1d286ec90502" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e464b-8574-7966-b9fd-d2fa148a029f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityAddressCityOrTown_019e464b-8574-7966-b9fd-d2fa148a029f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e464b-8574-707c-89db-1dba317e3b24" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityAddressStateOrProvince_019e464b-8574-707c-89db-1dba317e3b24" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e464b-8574-7d68-a546-3a45d8aac748" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityAddressPostalZipCode_019e464b-8574-7d68-a546-3a45d8aac748" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e464b-8574-7335-914a-cc890247e215" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_CityAreaCode_019e464b-8574-7335-914a-cc890247e215" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e464b-8574-7c26-9e98-971652efb333" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_LocalPhoneNumber_019e464b-8574-7c26-9e98-971652efb333" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e464b-8574-7211-8457-d5e0d9366107" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_Security12bTitle_019e464b-8574-7211-8457-d5e0d9366107" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e464b-8574-787e-be3c-929d996a01f4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_TradingSymbol_019e464b-8574-787e-be3c-929d996a01f4" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e464b-8574-7f08-9464-070155106ffe" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_SecurityExchangeName_019e464b-8574-7f08-9464-070155106ffe" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019e464b-8574-7750-b49c-330b6c791e61" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityCurrentReportingStatus_019e464b-8574-7750-b49c-330b6c791e61" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019e464b-8574-7a49-8a7d-82152b0753e0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityInteractiveDataCurrent_019e464b-8574-7a49-8a7d-82152b0753e0" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019e464b-8574-77ce-9f13-9c7d165ff2b0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityFilerCategory_019e464b-8574-77ce-9f13-9c7d165ff2b0" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019e464b-8574-7376-bbdf-0bbbc29ad4ef" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntitySmallBusiness_019e464b-8574-7376-bbdf-0bbbc29ad4ef" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e464b-8574-76d6-bc97-dc4eb093dd0e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e464b-8574-76d6-bc97-dc4eb093dd0e" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019e464b-8574-7187-ad91-ee293b6d05c7" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityShellCompany_019e464b-8574-7187-ad91-ee293b6d05c7" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019e464b-8574-72a6-8164-29a9cce4967e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019e464b-8574-72a6-8164-29a9cce4967e" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e464b-8574-781d-8b5b-269116d393f6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_AmendmentFlag_019e464b-8574-781d-8b5b-269116d393f6" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019e464b-8574-73cc-9573-8513a89cec78" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_DocumentFiscalYearFocus_019e464b-8574-73cc-9573-8513a89cec78" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019e464b-8574-7923-aee6-21a2a01b0398" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019e464b-8574-7923-aee6-21a2a01b0398" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e464b-8574-73cd-a366-280e80f48b46" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_EntityCentralIndexKey_019e464b-8574-73cd-a366-280e80f48b46" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019e464b-8574-7531-a191-f8409779e7df" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e464b-8574-7e25-9717-c01cf82c74d5" xlink:to="loc_dei_CurrentFiscalYearEndDate_019e464b-8574-7531-a191-f8409779e7df" xlink:type="arc" order="28"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="tlys-20260502.xsd#ConsolidatedBalanceSheets"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e464b-8574-7310-8ee4-809b6476b960" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e464b-8574-7045-875f-308cc954c070" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7310-8ee4-809b6476b960" xlink:to="loc_us-gaap_StatementTable_019e464b-8574-7045-875f-308cc954c070" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-7303-a917-a19ff3077e05" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e464b-8574-7045-875f-308cc954c070" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-7303-a917-a19ff3077e05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7303-a917-a19ff3077e05_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-7303-a917-a19ff3077e05" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7303-a917-a19ff3077e05_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7cdd-9c8d-09e092da0117" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-7303-a917-a19ff3077e05" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7cdd-9c8d-09e092da0117" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e464b-8574-79d9-a735-b9efba7196bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7cdd-9c8d-09e092da0117" xlink:to="loc_us-gaap_CommonClassAMember_019e464b-8574-79d9-a735-b9efba7196bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019e464b-8574-733b-b768-5483a71e37fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7cdd-9c8d-09e092da0117" xlink:to="loc_us-gaap_CommonClassBMember_019e464b-8574-733b-b768-5483a71e37fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019e464b-8574-72b1-b30d-b234082556cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7310-8ee4-809b6476b960" xlink:to="loc_us-gaap_AssetsAbstract_019e464b-8574-72b1-b30d-b234082556cb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_019e464b-8574-7312-8992-4fe0e087b5b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e464b-8574-72b1-b30d-b234082556cb" xlink:to="loc_us-gaap_AssetsCurrentAbstract_019e464b-8574-7312-8992-4fe0e087b5b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e464b-8574-78f6-a293-404724ffed94" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e464b-8574-7312-8992-4fe0e087b5b3" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e464b-8574-78f6-a293-404724ffed94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesCurrent_019e464b-8574-7c5d-b6f7-17829b3dc8af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MarketableSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e464b-8574-7312-8992-4fe0e087b5b3" xlink:to="loc_us-gaap_MarketableSecuritiesCurrent_019e464b-8574-7c5d-b6f7-17829b3dc8af" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesNetCurrent_019e464b-8574-7f11-b2bc-6f474887d591" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e464b-8574-7312-8992-4fe0e087b5b3" xlink:to="loc_us-gaap_ReceivablesNetCurrent_019e464b-8574-7f11-b2bc-6f474887d591" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_019e464b-8574-7a37-9c35-198ede71685a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e464b-8574-7312-8992-4fe0e087b5b3" xlink:to="loc_us-gaap_InventoryNet_019e464b-8574-7a37-9c35-198ede71685a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019e464b-8574-7834-aba1-5cc4b1fbc37e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e464b-8574-7312-8992-4fe0e087b5b3" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019e464b-8574-7834-aba1-5cc4b1fbc37e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019e464b-8574-71d0-895d-bdc1a1ebb58b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e464b-8574-7312-8992-4fe0e087b5b3" xlink:to="loc_us-gaap_AssetsCurrent_019e464b-8574-71d0-895d-bdc1a1ebb58b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019e464b-8574-756c-9c82-da85148763ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e464b-8574-72b1-b30d-b234082556cb" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019e464b-8574-756c-9c82-da85148763ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019e464b-8574-71d6-96c4-c6838e247446" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e464b-8574-72b1-b30d-b234082556cb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019e464b-8574-71d6-96c4-c6838e247446" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019e464b-8574-7738-885f-56b07131de5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e464b-8574-72b1-b30d-b234082556cb" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019e464b-8574-7738-885f-56b07131de5d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e464b-8574-7940-9303-b3b9b83cf9e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e464b-8574-72b1-b30d-b234082556cb" xlink:to="loc_us-gaap_Assets_019e464b-8574-7940-9303-b3b9b83cf9e6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7310-8ee4-809b6476b960" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_019e464b-8574-7576-af59-5ab47f1fca4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_019e464b-8574-7576-af59-5ab47f1fca4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019e464b-8574-71e0-a5e5-d0f08b836926" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e464b-8574-7576-af59-5ab47f1fca4b" xlink:to="loc_us-gaap_AccountsPayableCurrent_019e464b-8574-71e0-a5e5-d0f08b836926" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019e464b-8574-7651-9c37-b5d2ba02e6de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e464b-8574-7576-af59-5ab47f1fca4b" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019e464b-8574-7651-9c37-b5d2ba02e6de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019e464b-8574-7acd-a861-40f7b8264a8f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e464b-8574-7576-af59-5ab47f1fca4b" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019e464b-8574-7acd-a861-40f7b8264a8f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019e464b-8574-7d74-b259-d3774f3fd960" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e464b-8574-7576-af59-5ab47f1fca4b" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019e464b-8574-7d74-b259-d3774f3fd960" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019e464b-8574-7347-867f-410042cb51d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e464b-8574-7576-af59-5ab47f1fca4b" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019e464b-8574-7347-867f-410042cb51d3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_OperatingLeaseLiabilityCurrentRelatedParty_019e464b-8574-7d31-80a9-07330863d1af" xlink:href="tlys-20260502.xsd#tlys_OperatingLeaseLiabilityCurrentRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e464b-8574-7576-af59-5ab47f1fca4b" xlink:to="loc_tlys_OperatingLeaseLiabilityCurrentRelatedParty_019e464b-8574-7d31-80a9-07330863d1af" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_019e464b-8574-73f3-aea9-65d62ba3bcea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e464b-8574-7576-af59-5ab47f1fca4b" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_019e464b-8574-73f3-aea9-65d62ba3bcea" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019e464b-8574-7c4a-a0bf-8d0d1d812366" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e464b-8574-7576-af59-5ab47f1fca4b" xlink:to="loc_us-gaap_LiabilitiesCurrent_019e464b-8574-7c4a-a0bf-8d0d1d812366" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019e464b-8574-7e57-b51d-6617cd7bf6cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019e464b-8574-7e57-b51d-6617cd7bf6cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_OperatingLeaseLiabilityNoncurrentRelatedParty_019e464b-8574-7cf8-b80e-8121795aa851" xlink:href="tlys-20260502.xsd#tlys_OperatingLeaseLiabilityNoncurrentRelatedParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:to="loc_tlys_OperatingLeaseLiabilityNoncurrentRelatedParty_019e464b-8574-7cf8-b80e-8121795aa851" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019e464b-8574-7049-8f44-334981f2cf13" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019e464b-8574-7049-8f44-334981f2cf13" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_019e464b-8574-74f6-8086-be0215734036" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_019e464b-8574-74f6-8086-be0215734036" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019e464b-8574-742d-8d1e-d6784cf424b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:to="loc_us-gaap_Liabilities_019e464b-8574-742d-8d1e-d6784cf424b8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019e464b-8574-7f49-8740-224d16f4b8e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019e464b-8574-7f49-8740-224d16f4b8e6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_019e464b-8574-7b32-b214-7ba683acc247" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:to="loc_us-gaap_StockholdersEquityAbstract_019e464b-8574-7b32-b214-7ba683acc247" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019e464b-8574-7b91-aa71-2a8e03324eb6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e464b-8574-7b32-b214-7ba683acc247" xlink:to="loc_us-gaap_CommonStockValue_019e464b-8574-7b91-aa71-2a8e03324eb6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_019e464b-8574-7d3d-a8bb-ca6ef662c201" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e464b-8574-7b32-b214-7ba683acc247" xlink:to="loc_us-gaap_PreferredStockValue_019e464b-8574-7d3d-a8bb-ca6ef662c201" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_019e464b-8574-7e06-ab69-fa30404e1628" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e464b-8574-7b32-b214-7ba683acc247" xlink:to="loc_us-gaap_AdditionalPaidInCapital_019e464b-8574-7e06-ab69-fa30404e1628" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e464b-8574-79a5-9c8f-fd8c0a92aac4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e464b-8574-7b32-b214-7ba683acc247" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e464b-8574-79a5-9c8f-fd8c0a92aac4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019e464b-8574-7a9c-9030-9aa338a7b448" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e464b-8574-7b32-b214-7ba683acc247" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019e464b-8574-7a9c-9030-9aa338a7b448" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e464b-8574-7b7e-8ef2-d2a0b267a9d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e464b-8574-7b32-b214-7ba683acc247" xlink:to="loc_us-gaap_StockholdersEquity_019e464b-8574-7b7e-8ef2-d2a0b267a9d1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e464b-8574-7893-b7d1-bcfcd915ab14" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e464b-8574-7868-81fe-01e1e8274fbb" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e464b-8574-7893-b7d1-bcfcd915ab14" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" xlink:href="tlys-20260502.xsd#ConsolidatedBalanceSheetsParenthetical"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e464b-8574-767f-b43a-194a93211cfd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e464b-8574-70ad-82c5-928c608fe379" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-767f-b43a-194a93211cfd" xlink:to="loc_us-gaap_StatementTable_019e464b-8574-70ad-82c5-928c608fe379" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-73d9-a19b-2dff6d529cfd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e464b-8574-70ad-82c5-928c608fe379" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-73d9-a19b-2dff6d529cfd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-8574-73d9-a19b-2dff6d529cfd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-73d9-a19b-2dff6d529cfd" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-8574-73d9-a19b-2dff6d529cfd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7a56-a017-9d7a2b47f411" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-73d9-a19b-2dff6d529cfd" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7a56-a017-9d7a2b47f411" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e464b-8574-73da-9c45-b86ac2d4342a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7a56-a017-9d7a2b47f411" xlink:to="loc_us-gaap_CommonClassAMember_019e464b-8574-73da-9c45-b86ac2d4342a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019e464b-8574-7f51-b78b-18ce57d07127" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7a56-a017-9d7a2b47f411" xlink:to="loc_us-gaap_CommonClassBMember_019e464b-8574-7f51-b78b-18ce57d07127" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e464b-8574-7f8e-9003-1537816536d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-767f-b43a-194a93211cfd" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e464b-8574-7f8e-9003-1537816536d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019e464b-8574-73b1-8311-4fd8eac98aca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-767f-b43a-194a93211cfd" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019e464b-8574-73b1-8311-4fd8eac98aca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019e464b-8574-7229-8698-177dbbe757e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-767f-b43a-194a93211cfd" xlink:to="loc_us-gaap_CommonStockSharesIssued_019e464b-8574-7229-8698-177dbbe757e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e464b-8574-7114-af9d-00273e3ee638" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-767f-b43a-194a93211cfd" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e464b-8574-7114-af9d-00273e3ee638" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019e464b-8574-7034-9ce0-c7a58098a6a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-767f-b43a-194a93211cfd" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019e464b-8574-7034-9ce0-c7a58098a6a1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_019e464b-8574-7248-83e6-2ca842cb80b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-767f-b43a-194a93211cfd" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_019e464b-8574-7248-83e6-2ca842cb80b5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued_019e464b-8574-76c1-a751-c6241c990131" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-767f-b43a-194a93211cfd" xlink:to="loc_us-gaap_PreferredStockSharesIssued_019e464b-8574-76c1-a751-c6241c990131" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_019e464b-8574-7af2-a60a-f51a075847f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-767f-b43a-194a93211cfd" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_019e464b-8574-7af2-a60a-f51a075847f9" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/ConsolidatedStatementsofOperations" xlink:type="simple" xlink:href="tlys-20260502.xsd#ConsolidatedStatementsofOperations"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/ConsolidatedStatementsofOperations" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e464b-8574-71a5-afe0-1a4ad7b65d1d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_StatementTable_019e464b-8574-71a5-afe0-1a4ad7b65d1d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e464b-8574-7573-83dc-af5c7de98261" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e464b-8574-71a5-afe0-1a4ad7b65d1d" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e464b-8574-7573-83dc-af5c7de98261" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e464b-8574-7573-83dc-af5c7de98261_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e464b-8574-7573-83dc-af5c7de98261" xlink:to="loc_us-gaap_EquityComponentDomain_019e464b-8574-7573-83dc-af5c7de98261_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e464b-8574-75a6-a3b1-ff122bbf89c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e464b-8574-7573-83dc-af5c7de98261" xlink:to="loc_us-gaap_EquityComponentDomain_019e464b-8574-75a6-a3b1-ff122bbf89c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_CommonClassAAndClassBMember_019e464b-8574-7fa3-b26a-4f96007630f9" xlink:href="tlys-20260502.xsd#tlys_CommonClassAAndClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e464b-8574-75a6-a3b1-ff122bbf89c3" xlink:to="loc_tlys_CommonClassAAndClassBMember_019e464b-8574-7fa3-b26a-4f96007630f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e464b-8574-793e-90af-3ca04e165cde" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_Revenues_019e464b-8574-793e-90af-3ca04e165cde" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_CostOfGoodsAndServicesSoldExcludingRent_019e464b-8574-7c38-b208-ee6e972e0303" xlink:href="tlys-20260502.xsd#tlys_CostOfGoodsAndServicesSoldExcludingRent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_tlys_CostOfGoodsAndServicesSoldExcludingRent_019e464b-8574-7c38-b208-ee6e972e0303" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_RentExpenseRelatedPartyCostOfGoodsSold_019e464b-8574-7ac3-b8a1-c0d28f6501b9" xlink:href="tlys-20260502.xsd#tlys_RentExpenseRelatedPartyCostOfGoodsSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_tlys_RentExpenseRelatedPartyCostOfGoodsSold_019e464b-8574-7ac3-b8a1-c0d28f6501b9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019e464b-8574-7c26-8fda-283a7debe331" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019e464b-8574-7c26-8fda-283a7debe331" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019e464b-8574-752e-8bee-4f8ff413e15f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_GrossProfit_019e464b-8574-752e-8bee-4f8ff413e15f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_SellingGeneralAndAdministrativeExpensesExcludingRentExpense_019e464b-8574-7bc9-8b8c-1c43c3c97ba3" xlink:href="tlys-20260502.xsd#tlys_SellingGeneralAndAdministrativeExpensesExcludingRentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_tlys_SellingGeneralAndAdministrativeExpensesExcludingRentExpense_019e464b-8574-7bc9-8b8c-1c43c3c97ba3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_RentExpenseRelatedPartySellingGeneralAndAdministrativeExpenses_019e464b-8574-7bb7-a9ff-013dbad2f921" xlink:href="tlys-20260502.xsd#tlys_RentExpenseRelatedPartySellingGeneralAndAdministrativeExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_tlys_RentExpenseRelatedPartySellingGeneralAndAdministrativeExpenses_019e464b-8574-7bb7-a9ff-013dbad2f921" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e464b-8574-72af-9f06-ade2bd32a0ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019e464b-8574-72af-9f06-ade2bd32a0ed" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e464b-8574-7dcc-a092-e80b0ac3509c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e464b-8574-7dcc-a092-e80b0ac3509c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019e464b-8574-7797-bbaf-c55c9a6c989a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019e464b-8574-7797-bbaf-c55c9a6c989a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e464b-8574-779b-a534-9f3cf6dafac4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e464b-8574-779b-a534-9f3cf6dafac4" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e464b-8574-767d-87e5-90df056557fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e464b-8574-767d-87e5-90df056557fc" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e464b-8574-7616-8d76-2a46b38ee275" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_NetIncomeLoss_019e464b-8574-7616-8d76-2a46b38ee275" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019e464b-8574-7c47-9402-e1632ad3098f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_EarningsPerShareBasic_019e464b-8574-7c47-9402-e1632ad3098f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019e464b-8574-741b-917a-9d57320108bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019e464b-8574-741b-917a-9d57320108bd" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e464b-8574-7301-90eb-a6908678c5cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e464b-8574-7301-90eb-a6908678c5cd" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e464b-8574-7de0-9303-793271a8363f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7efd-b9b8-c0ba634d071d" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e464b-8574-7de0-9303-793271a8363f" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/ConsolidatedStatementofStockholdersEquity" xlink:type="simple" xlink:href="tlys-20260502.xsd#ConsolidatedStatementofStockholdersEquity"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/ConsolidatedStatementofStockholdersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e464b-8574-7e97-9868-adfa30968237" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e464b-8574-7490-bee3-dc6fbd0f2a29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7e97-9868-adfa30968237" xlink:to="loc_us-gaap_StatementTable_019e464b-8574-7490-bee3-dc6fbd0f2a29" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-73f4-b3dc-17ce0ad95c0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e464b-8574-7490-bee3-dc6fbd0f2a29" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-73f4-b3dc-17ce0ad95c0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-8574-73f4-b3dc-17ce0ad95c0f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-73f4-b3dc-17ce0ad95c0f" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-8574-73f4-b3dc-17ce0ad95c0f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7d09-b3c2-ef4047b49deb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-8574-73f4-b3dc-17ce0ad95c0f" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7d09-b3c2-ef4047b49deb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e464b-8574-761e-b331-a5b251bd3d92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7d09-b3c2-ef4047b49deb" xlink:to="loc_us-gaap_CommonClassAMember_019e464b-8574-761e-b331-a5b251bd3d92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019e464b-8574-7933-94b5-cefa9c7be0be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e464b-8574-7d09-b3c2-ef4047b49deb" xlink:to="loc_us-gaap_CommonClassBMember_019e464b-8574-7933-94b5-cefa9c7be0be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e464b-8574-7d15-821e-9fe44c909b7f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e464b-8574-7490-bee3-dc6fbd0f2a29" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e464b-8574-7d15-821e-9fe44c909b7f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e464b-8574-7d15-821e-9fe44c909b7f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e464b-8574-7d15-821e-9fe44c909b7f" xlink:to="loc_us-gaap_EquityComponentDomain_019e464b-8574-7d15-821e-9fe44c909b7f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e464b-8574-7c82-ba54-704072bb0af5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e464b-8574-7d15-821e-9fe44c909b7f" xlink:to="loc_us-gaap_EquityComponentDomain_019e464b-8574-7c82-ba54-704072bb0af5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e464b-8574-7e42-a6c5-ae9d0d04e76b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e464b-8574-7c82-ba54-704072bb0af5" xlink:to="loc_us-gaap_CommonStockMember_019e464b-8574-7e42-a6c5-ae9d0d04e76b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019e464b-8574-7912-94c8-8946b92f5360" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e464b-8574-7c82-ba54-704072bb0af5" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019e464b-8574-7912-94c8-8946b92f5360" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e464b-8574-79a7-b697-f3fda22914c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e464b-8574-7c82-ba54-704072bb0af5" xlink:to="loc_us-gaap_RetainedEarningsMember_019e464b-8574-79a7-b697-f3fda22914c5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e464b-8574-719e-ba6d-673eab4cd815" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e464b-8574-7c82-ba54-704072bb0af5" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e464b-8574-719e-ba6d-673eab4cd815" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e464b-8574-716d-aaec-c903ff19f6d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e464b-8574-7e97-9868-adfa30968237" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e464b-8574-716d-aaec-c903ff19f6d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_019e464b-8574-7be8-b173-1e91967acdff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e464b-8574-716d-aaec-c903ff19f6d9" xlink:to="loc_us-gaap_SharesOutstanding_019e464b-8574-7be8-b173-1e91967acdff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e464b-8574-74b3-b337-c8ff2eadcf14" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e464b-8574-716d-aaec-c903ff19f6d9" xlink:to="loc_us-gaap_StockholdersEquity_019e464b-8574-74b3-b337-c8ff2eadcf14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e464b-8574-7ff7-99ac-f23bc5852b41" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e464b-8574-716d-aaec-c903ff19f6d9" xlink:to="loc_us-gaap_NetIncomeLoss_019e464b-8574-7ff7-99ac-f23bc5852b41" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e464b-8574-7ea4-bb83-5d619af274f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e464b-8574-716d-aaec-c903ff19f6d9" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e464b-8574-7ea4-bb83-5d619af274f1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019e7540-47c4-798f-9d3f-13754f38d7be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e464b-8574-716d-aaec-c903ff19f6d9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019e7540-47c4-798f-9d3f-13754f38d7be" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019e464b-8574-739a-94a0-e81853bc5abf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e464b-8574-716d-aaec-c903ff19f6d9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019e464b-8574-739a-94a0-e81853bc5abf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_019e464b-8574-7b9e-8533-3087f1d7c65b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e464b-8574-716d-aaec-c903ff19f6d9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_019e464b-8574-7b9e-8533-3087f1d7c65b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesOutstanding_019e464b-8574-72d3-8cdc-0b1b91f7973b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e464b-8574-7c35-86f8-b2acfaabf769" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesScheduleofRevenueRecognitionDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#SummaryofSignificantAccountingPoliciesScheduleofRevenueRecognitionDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesScheduleofRevenueRecognitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019e464b-8574-7b3d-9e1b-26cab1f1a847" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019e464b-8574-762e-8466-83efc17f8d60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e464b-8574-7b3d-9e1b-26cab1f1a847" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019e464b-8574-762e-8466-83efc17f8d60" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e464b-8574-7d8e-b841-c87de3eee9e4" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e464b-8574-762e-8466-83efc17f8d60" xlink:to="loc_srt_ProductOrServiceAxis_019e464b-8574-7d8e-b841-c87de3eee9e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e464b-8574-7d8e-b841-c87de3eee9e4_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019e464b-8574-7d8e-b841-c87de3eee9e4" xlink:to="loc_srt_ProductsAndServicesDomain_019e464b-8574-7d8e-b841-c87de3eee9e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e464b-8574-71b2-af9f-4e6c1568e797" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019e464b-8574-7d8e-b841-c87de3eee9e4" xlink:to="loc_srt_ProductsAndServicesDomain_019e464b-8574-71b2-af9f-4e6c1568e797" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_RetailStoreMember_019e464b-8574-7c13-b1ca-ec89c7bc64fa" xlink:href="tlys-20260502.xsd#tlys_RetailStoreMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-71b2-af9f-4e6c1568e797" xlink:to="loc_tlys_RetailStoreMember_019e464b-8574-7c13-b1ca-ec89c7bc64fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_EcommerceMember_019e464b-8574-7e23-b97c-eedbcedaadfd" xlink:href="tlys-20260502.xsd#tlys_EcommerceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-71b2-af9f-4e6c1568e797" xlink:to="loc_tlys_EcommerceMember_019e464b-8574-7e23-b97c-eedbcedaadfd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_MensMember_019e464b-8574-7cd7-94e2-6e535a8d8d93" xlink:href="tlys-20260502.xsd#tlys_MensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-71b2-af9f-4e6c1568e797" xlink:to="loc_tlys_MensMember_019e464b-8574-7cd7-94e2-6e535a8d8d93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_WomensMember_019e464b-8574-7170-a1d1-bfbac65720c6" xlink:href="tlys-20260502.xsd#tlys_WomensMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-71b2-af9f-4e6c1568e797" xlink:to="loc_tlys_WomensMember_019e464b-8574-7170-a1d1-bfbac65720c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_FootwearMember_019e464b-8574-7cd9-a2c6-d18f5954899c" xlink:href="tlys-20260502.xsd#tlys_FootwearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-71b2-af9f-4e6c1568e797" xlink:to="loc_tlys_FootwearMember_019e464b-8574-7cd9-a2c6-d18f5954899c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_AccessoriesMember_019e464b-8574-7f04-8b84-cc710f13bb4e" xlink:href="tlys-20260502.xsd#tlys_AccessoriesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-71b2-af9f-4e6c1568e797" xlink:to="loc_tlys_AccessoriesMember_019e464b-8574-7f04-8b84-cc710f13bb4e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_GirlsMember_019e464b-8574-7532-a3c4-d9f58bc6c69b" xlink:href="tlys-20260502.xsd#tlys_GirlsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-71b2-af9f-4e6c1568e797" xlink:to="loc_tlys_GirlsMember_019e464b-8574-7532-a3c4-d9f58bc6c69b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_BoysMember_019e464b-8574-756f-8591-c0db8c299612" xlink:href="tlys-20260502.xsd#tlys_BoysMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-71b2-af9f-4e6c1568e797" xlink:to="loc_tlys_BoysMember_019e464b-8574-756f-8591-c0db8c299612" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019e464b-8574-7a6b-b2b7-7abf3606f333" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerSalesChannelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e464b-8574-762e-8466-83efc17f8d60" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019e464b-8574-7a6b-b2b7-7abf3606f333" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e464b-8574-7a6b-b2b7-7abf3606f333_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019e464b-8574-7a6b-b2b7-7abf3606f333" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e464b-8574-7a6b-b2b7-7abf3606f333_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e464b-8574-774e-b731-0c41f3e7a953" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019e464b-8574-7a6b-b2b7-7abf3606f333" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e464b-8574-774e-b731-0c41f3e7a953" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesChannelThroughIntermediaryMember_019e464b-8574-7f4d-8430-70ff4543cc75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SalesChannelThroughIntermediaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e464b-8574-774e-b731-0c41f3e7a953" xlink:to="loc_us-gaap_SalesChannelThroughIntermediaryMember_019e464b-8574-7f4d-8430-70ff4543cc75" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesChannelDirectlyToConsumerMember_019e464b-8574-7613-b594-14cb4e6941a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SalesChannelDirectlyToConsumerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e464b-8574-774e-b731-0c41f3e7a953" xlink:to="loc_us-gaap_SalesChannelDirectlyToConsumerMember_019e464b-8574-7613-b594-14cb4e6941a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e464b-8574-7a58-9221-8db88e9654f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e464b-8574-7b3d-9e1b-26cab1f1a847" xlink:to="loc_us-gaap_Revenues_019e464b-8574-7a58-9221-8db88e9654f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_PercentageOfTotalNetSales_019e464b-8574-7668-9048-734f1d6b9900" xlink:href="tlys-20260502.xsd#tlys_PercentageOfTotalNetSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e464b-8574-7b3d-9e1b-26cab1f1a847" xlink:to="loc_tlys_PercentageOfTotalNetSales_019e464b-8574-7668-9048-734f1d6b9900" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#SummaryofSignificantAccountingPoliciesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:href="tlys-20260502.xsd#tlys_AccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_AccountingPoliciesTable_019e464b-8574-7a17-9866-ba93c4627495" xlink:href="tlys-20260502.xsd#tlys_AccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_tlys_AccountingPoliciesTable_019e464b-8574-7a17-9866-ba93c4627495" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_019e464b-8574-78ba-813f-49527c2f7b74" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tlys_AccountingPoliciesTable_019e464b-8574-7a17-9866-ba93c4627495" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_019e464b-8574-78ba-813f-49527c2f7b74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_019e464b-8574-78ba-813f-49527c2f7b74_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_019e464b-8574-78ba-813f-49527c2f7b74" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_019e464b-8574-78ba-813f-49527c2f7b74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_019e464b-8574-7e27-905a-4b1aab236777" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_019e464b-8574-78ba-813f-49527c2f7b74" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_019e464b-8574-7e27-905a-4b1aab236777" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesReturnsAndAllowancesMember_019e464b-8574-7ad6-9d54-7bcc072cabdd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SalesReturnsAndAllowancesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_019e464b-8574-7e27-905a-4b1aab236777" xlink:to="loc_us-gaap_SalesReturnsAndAllowancesMember_019e464b-8574-7ad6-9d54-7bcc072cabdd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e464b-8574-7524-b39d-3731972d9a31" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tlys_AccountingPoliciesTable_019e464b-8574-7a17-9866-ba93c4627495" xlink:to="loc_srt_ProductOrServiceAxis_019e464b-8574-7524-b39d-3731972d9a31" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e464b-8574-7524-b39d-3731972d9a31_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019e464b-8574-7524-b39d-3731972d9a31" xlink:to="loc_srt_ProductsAndServicesDomain_019e464b-8574-7524-b39d-3731972d9a31_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e464b-8574-7988-bf73-0275821cd334" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019e464b-8574-7524-b39d-3731972d9a31" xlink:to="loc_srt_ProductsAndServicesDomain_019e464b-8574-7988-bf73-0275821cd334" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_GCRedemptionMember_019e464b-8574-7d82-836c-797c219c5555" xlink:href="tlys-20260502.xsd#tlys_GCRedemptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-7988-bf73-0275821cd334" xlink:to="loc_tlys_GCRedemptionMember_019e464b-8574-7d82-836c-797c219c5555" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_BreakageMember_019e464b-8574-76f3-a7e9-78c8bc981952" xlink:href="tlys-20260502.xsd#tlys_BreakageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-7988-bf73-0275821cd334" xlink:to="loc_tlys_BreakageMember_019e464b-8574-76f3-a7e9-78c8bc981952" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_CustomerLoyaltyProgramMember_019e464b-8574-7be7-9038-a6f3b8c10add" xlink:href="tlys-20260502.xsd#tlys_CustomerLoyaltyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e464b-8574-7988-bf73-0275821cd334" xlink:to="loc_tlys_CustomerLoyaltyProgramMember_019e464b-8574-7be7-9038-a6f3b8c10add" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e464b-8574-7ee0-a3de-ba6fe42b8458" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tlys_AccountingPoliciesTable_019e464b-8574-7a17-9866-ba93c4627495" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e464b-8574-7ee0-a3de-ba6fe42b8458" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e464b-8574-7ee0-a3de-ba6fe42b8458_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e464b-8574-7ee0-a3de-ba6fe42b8458" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e464b-8574-7ee0-a3de-ba6fe42b8458_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e464b-8574-7ac8-bd27-a348f9a3eef8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_019e464b-8574-7ee0-a3de-ba6fe42b8458" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e464b-8574-7ac8-bd27-a348f9a3eef8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_A10And12WhatneyIrvineCaliforniaMember_019e464b-8574-7720-9a9f-62a27ad3d198" xlink:href="tlys-20260502.xsd#tlys_A10And12WhatneyIrvineCaliforniaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e464b-8574-7ac8-bd27-a348f9a3eef8" xlink:to="loc_tlys_A10And12WhatneyIrvineCaliforniaMember_019e464b-8574-7720-9a9f-62a27ad3d198" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_A11WhatneyIrvineCaliforniaMember_019e464b-8574-7e2e-a362-2de16f15ddeb" xlink:href="tlys-20260502.xsd#tlys_A11WhatneyIrvineCaliforniaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e464b-8574-7ac8-bd27-a348f9a3eef8" xlink:to="loc_tlys_A11WhatneyIrvineCaliforniaMember_019e464b-8574-7e2e-a362-2de16f15ddeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_A17PasteurIrvineCaliforniaMember_019e464b-8574-7bf3-81d6-2aaf0f92f4f1" xlink:href="tlys-20260502.xsd#tlys_A17PasteurIrvineCaliforniaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_019e464b-8574-7ac8-bd27-a348f9a3eef8" xlink:to="loc_tlys_A17PasteurIrvineCaliforniaMember_019e464b-8574-7bf3-81d6-2aaf0f92f4f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e464b-8574-7572-987d-c635c37a2d69" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tlys_AccountingPoliciesTable_019e464b-8574-7a17-9866-ba93c4627495" xlink:to="loc_srt_RangeAxis_019e464b-8574-7572-987d-c635c37a2d69" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e464b-8574-7572-987d-c635c37a2d69_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e464b-8574-7572-987d-c635c37a2d69" xlink:to="loc_srt_RangeMember_019e464b-8574-7572-987d-c635c37a2d69_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e464b-8574-76b2-bbfa-0b3c62792374" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e464b-8574-7572-987d-c635c37a2d69" xlink:to="loc_srt_RangeMember_019e464b-8574-76b2-bbfa-0b3c62792374" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e464b-8574-7619-a605-00615e38213a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e464b-8574-76b2-bbfa-0b3c62792374" xlink:to="loc_srt_MinimumMember_019e464b-8574-7619-a605-00615e38213a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e464b-8574-7427-8223-3f8fc4cfd541" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e464b-8574-76b2-bbfa-0b3c62792374" xlink:to="loc_srt_MaximumMember_019e464b-8574-7427-8223-3f8fc4cfd541" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e464b-8574-790a-bd0d-933757f621fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tlys_AccountingPoliciesTable_019e464b-8574-7a17-9866-ba93c4627495" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e464b-8574-790a-bd0d-933757f621fb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-790a-bd0d-933757f621fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e464b-8574-790a-bd0d-933757f621fb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-790a-bd0d-933757f621fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-7c7a-9350-6ecacb98eec2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e464b-8574-790a-bd0d-933757f621fb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-7c7a-9350-6ecacb98eec2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_019e464b-8574-791a-8751-a659ced1a214" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-7c7a-9350-6ecacb98eec2" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_019e464b-8574-791a-8751-a659ced1a214" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019e464b-8574-7c28-920b-9b9e7cdaf7dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-7c7a-9350-6ecacb98eec2" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019e464b-8574-7c28-920b-9b9e7cdaf7dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_ComputerEquipmentAndSoftwareMember_019e464b-8574-71c6-9c47-5bd5de7eae7a" xlink:href="tlys-20260502.xsd#tlys_ComputerEquipmentAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-7c7a-9350-6ecacb98eec2" xlink:to="loc_tlys_ComputerEquipmentAndSoftwareMember_019e464b-8574-71c6-9c47-5bd5de7eae7a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_019e464b-8574-7c01-81af-abfba465ee42" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-7c7a-9350-6ecacb98eec2" xlink:to="loc_us-gaap_BuildingMember_019e464b-8574-7c01-81af-abfba465ee42" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e464b-8574-71b7-a1c7-3f882bce8caa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tlys_AccountingPoliciesTable_019e464b-8574-7a17-9866-ba93c4627495" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e464b-8574-71b7-a1c7-3f882bce8caa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e464b-8574-71b7-a1c7-3f882bce8caa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e464b-8574-71b7-a1c7-3f882bce8caa" xlink:to="loc_us-gaap_RelatedPartyDomain_019e464b-8574-71b7-a1c7-3f882bce8caa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e464b-8574-711c-a863-68af09bd5da5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e464b-8574-71b7-a1c7-3f882bce8caa" xlink:to="loc_us-gaap_RelatedPartyDomain_019e464b-8574-711c-a863-68af09bd5da5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_019e464b-8574-7277-aa08-b924650133d3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e464b-8574-711c-a863-68af09bd5da5" xlink:to="loc_srt_AffiliatedEntityMember_019e464b-8574-7277-aa08-b924650133d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsAxis_019e464b-8574-70ab-a81f-54e75e65319b" xlink:href="tlys-20260502.xsd#tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tlys_AccountingPoliciesTable_019e464b-8574-7a17-9866-ba93c4627495" xlink:to="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsAxis_019e464b-8574-70ab-a81f-54e75e65319b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-70ab-a81f-54e75e65319b_default" xlink:href="tlys-20260502.xsd#tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsAxis_019e464b-8574-70ab-a81f-54e75e65319b" xlink:to="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-70ab-a81f-54e75e65319b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-7dce-9232-b5bbb653c9f3" xlink:href="tlys-20260502.xsd#tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsAxis_019e464b-8574-70ab-a81f-54e75e65319b" xlink:to="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-7dce-9232-b5bbb653c9f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_RelatedPartiesMember_019e464b-8574-7e9a-90e4-2988b64daabe" xlink:href="tlys-20260502.xsd#tlys_RelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-7dce-9232-b5bbb653c9f3" xlink:to="loc_tlys_RelatedPartiesMember_019e464b-8574-7e9a-90e4-2988b64daabe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019e74f2-8601-7523-8228-592a18de7d30" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tlys_AccountingPoliciesTable_019e464b-8574-7a17-9866-ba93c4627495" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019e74f2-8601-7523-8228-592a18de7d30" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019e74f2-8601-7523-8228-592a18de7d30_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019e74f2-8601-7523-8228-592a18de7d30" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019e74f2-8601-7523-8228-592a18de7d30_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019e74f2-8601-74e2-8777-6a51440ea4a2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_019e74f2-8601-7523-8228-592a18de7d30" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019e74f2-8601-74e2-8777-6a51440ea4a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLeaseNotYetCommencedMember_019e74f2-d952-7871-a0ce-43fda0fba249" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLeaseNotYetCommencedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_019e74f2-8601-74e2-8777-6a51440ea4a2" xlink:to="loc_us-gaap_OperatingLeaseLeaseNotYetCommencedMember_019e74f2-d952-7871-a0ce-43fda0fba249" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_019e464b-8574-79d3-a87c-f5075283d959" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_019e464b-8574-79d3-a87c-f5075283d959" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019e464b-8574-7830-bdd2-406ca7a32ed9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019e464b-8574-7830-bdd2-406ca7a32ed9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_019e464b-8574-7880-b4b0-23cc40259b96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityChangeInTimeframePerformanceObligationSatisfiedRevenueRecognized_019e464b-8574-7880-b4b0-23cc40259b96" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019e464b-8574-7778-8c8c-e1572d928a13" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_019e464b-8574-7778-8c8c-e1572d928a13" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_UnredeemedAwardsandAccumulatedPointsExpirationPeriod_019e464b-8574-7d44-83fc-ef0466079571" xlink:href="tlys-20260502.xsd#tlys_UnredeemedAwardsandAccumulatedPointsExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_tlys_UnredeemedAwardsandAccumulatedPointsExpirationPeriod_019e464b-8574-7d44-83fc-ef0466079571" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_019e464b-8574-7994-b1ea-dd8b4030e2ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_ContractWithCustomerLiability_019e464b-8574-7994-b1ea-dd8b4030e2ad" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019e464b-8574-73aa-b3b7-5b368756c000" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_019e464b-8574-73aa-b3b7-5b368756c000" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_019e464b-8574-7270-be38-9fc2ccfc4f8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_Depreciation_019e464b-8574-7270-be38-9fc2ccfc4f8e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019e464b-8574-7e40-b9b1-4b6130617ed7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019e464b-8574-7e40-b9b1-4b6130617ed7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_LesseeLeaseNumberOfOptionsToRenew_019e464b-8574-7fa5-9e8d-8fe0f5a75ee7" xlink:href="tlys-20260502.xsd#tlys_LesseeLeaseNumberOfOptionsToRenew"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_tlys_LesseeLeaseNumberOfOptionsToRenew_019e464b-8574-7fa5-9e8d-8fe0f5a75ee7" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AreaOfRealEstateProperty_019e464b-8574-7032-ad32-ce1e7e6db379" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AreaOfRealEstateProperty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_AreaOfRealEstateProperty_019e464b-8574-7032-ad32-ce1e7e6db379" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseExpense_019e464b-8574-70f9-a505-0ac37a9bc934" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_OperatingLeaseExpense_019e464b-8574-70f9-a505-0ac37a9bc934" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_PercentAnnualLeaseAmountIncrease_019e464b-8574-70af-abac-c3232b7f257d" xlink:href="tlys-20260502.xsd#tlys_PercentAnnualLeaseAmountIncrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_tlys_PercentAnnualLeaseAmountIncrease_019e464b-8574-70af-abac-c3232b7f257d" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubleaseIncome_019e464b-8574-78a1-aa09-6d560e936bed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubleaseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_SubleaseIncome_019e464b-8574-78a1-aa09-6d560e936bed" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_SubleaseTermOfContract_019e464b-8574-74fc-9db3-e7474682a2bf" xlink:href="tlys-20260502.xsd#tlys_SubleaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_tlys_SubleaseTermOfContract_019e464b-8574-74fc-9db3-e7474682a2bf" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019e464b-8574-7070-9aa2-eebca3a7474e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019e464b-8574-7070-9aa2-eebca3a7474e" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019e464b-8574-7c04-8138-f4931ccdc1bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_AccountingPoliciesLineItems_019e464b-8574-741f-86fe-da6c555635f2" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019e464b-8574-7c04-8138-f4931ccdc1bf" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesPropertyandEquipmentDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#SummaryofSignificantAccountingPoliciesPropertyandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesPropertyandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e464b-8574-719b-b48b-e03d42b56b26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e464b-8574-7329-b974-ed2fc5ec7e98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e464b-8574-719b-b48b-e03d42b56b26" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e464b-8574-7329-b974-ed2fc5ec7e98" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e464b-8574-7f20-aa06-4a582953c45d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019e464b-8574-7329-b974-ed2fc5ec7e98" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e464b-8574-7f20-aa06-4a582953c45d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-7f20-aa06-4a582953c45d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e464b-8574-7f20-aa06-4a582953c45d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-7f20-aa06-4a582953c45d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-72ba-9c4b-9c4b3f69f3f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019e464b-8574-7f20-aa06-4a582953c45d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-72ba-9c4b-9c4b3f69f3f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_019e464b-8574-76ae-ba14-a39a367a38b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-72ba-9c4b-9c4b3f69f3f6" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_019e464b-8574-76ae-ba14-a39a367a38b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_ComputerEquipmentAndSoftwareMember_019e464b-8574-7eb0-b1eb-9c97d59ef24c" xlink:href="tlys-20260502.xsd#tlys_ComputerEquipmentAndSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-72ba-9c4b-9c4b3f69f3f6" xlink:to="loc_tlys_ComputerEquipmentAndSoftwareMember_019e464b-8574-7eb0-b1eb-9c97d59ef24c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019e464b-8574-7195-aeb9-3867c957f89f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-72ba-9c4b-9c4b3f69f3f6" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019e464b-8574-7195-aeb9-3867c957f89f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_019e464b-8574-70bc-b670-336c5e2fa08a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-72ba-9c4b-9c4b3f69f3f6" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_019e464b-8574-70bc-b670-336c5e2fa08a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VehiclesMember_019e464b-8574-7b79-8590-a2bd15122634" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VehiclesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-72ba-9c4b-9c4b3f69f3f6" xlink:to="loc_us-gaap_VehiclesMember_019e464b-8574-7b79-8590-a2bd15122634" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_019e464b-8574-774a-8652-717893393f67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019e464b-8574-72ba-9c4b-9c4b3f69f3f6" xlink:to="loc_us-gaap_ConstructionInProgressMember_019e464b-8574-774a-8652-717893393f67" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019e464b-8574-7082-82ed-2c2c35fee865" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e464b-8574-719b-b48b-e03d42b56b26" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019e464b-8574-7082-82ed-2c2c35fee865" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019e464b-8574-7805-a8db-c7c182284a67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e464b-8574-719b-b48b-e03d42b56b26" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019e464b-8574-7805-a8db-c7c182284a67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019e464b-8574-797e-bc90-70d3e9e811d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019e464b-8574-719b-b48b-e03d42b56b26" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019e464b-8574-797e-bc90-70d3e9e811d2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesScheduleofOperatingLeaseLiabilityDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#SummaryofSignificantAccountingPoliciesScheduleofOperatingLeaseLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesScheduleofOperatingLeaseLiabilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-721c-8b7e-b3b1b4a6bddd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019e464b-8574-7ffa-8283-ed195c82b0fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-721c-8b7e-b3b1b4a6bddd" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019e464b-8574-7ffa-8283-ed195c82b0fc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsAxis_019e464b-8574-768e-a850-5edb6fae7ba6" xlink:href="tlys-20260502.xsd#tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019e464b-8574-7ffa-8283-ed195c82b0fc" xlink:to="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsAxis_019e464b-8574-768e-a850-5edb6fae7ba6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-768e-a850-5edb6fae7ba6_default" xlink:href="tlys-20260502.xsd#tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsAxis_019e464b-8574-768e-a850-5edb6fae7ba6" xlink:to="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-768e-a850-5edb6fae7ba6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-78a2-811f-5d6c6e64b781" xlink:href="tlys-20260502.xsd#tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsAxis_019e464b-8574-768e-a850-5edb6fae7ba6" xlink:to="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-78a2-811f-5d6c6e64b781" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_RelatedPartiesMember_019e464b-8574-7021-8577-eb121ce9124f" xlink:href="tlys-20260502.xsd#tlys_RelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-78a2-811f-5d6c6e64b781" xlink:to="loc_tlys_RelatedPartiesMember_019e464b-8574-7021-8577-eb121ce9124f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_OtherMember_019e464b-8574-7d63-bf2b-5c2e8803a321" xlink:href="tlys-20260502.xsd#tlys_OtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_OperatingLeasesFromAffiliatedAndUnaffiliatedLessorsDomain_019e464b-8574-78a2-811f-5d6c6e64b781" xlink:to="loc_tlys_OtherMember_019e464b-8574-7d63-bf2b-5c2e8803a321" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-721c-8b7e-b3b1b4a6bddd" xlink:to="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_019e464b-8574-7036-8243-2fd579b37424" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_019e464b-8574-7036-8243-2fd579b37424" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019e74f6-bdf2-768b-9760-5b3c58f9fc2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019e74f6-bdf2-768b-9760-5b3c58f9fc2d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019e464b-8574-7c8a-8b82-03891caadc1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019e464b-8574-7c8a-8b82-03891caadc1a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019e464b-8574-70f4-91db-97fc40406699" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019e464b-8574-70f4-91db-97fc40406699" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019e464b-8574-7192-a241-9e7824e213aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019e464b-8574-7192-a241-9e7824e213aa" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour_019e464b-8574-7fdb-983e-a6f6b6cfdfe3" xlink:href="tlys-20260502.xsd#tlys_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:to="loc_tlys_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour_019e464b-8574-7fdb-983e-a6f6b6cfdfe3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e464b-8574-7f34-8b35-851265bee688" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019e464b-8574-7f34-8b35-851265bee688" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_019e464b-8574-7dc3-96ac-dedf834b9f71" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_019e464b-8574-7dc3-96ac-dedf834b9f71" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019e464b-8574-7984-bb63-fa675bf7c2fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_019e464b-8574-75b0-a4c8-33762d0d0e1d" xlink:to="loc_us-gaap_OperatingLeaseLiability_019e464b-8574-7984-bb63-fa675bf7c2fa" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsFiscalYearMaturityAbstract_019e464b-8574-71a5-95df-c00cf4cf54f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorOperatingLeasePaymentsFiscalYearMaturityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-721c-8b7e-b3b1b4a6bddd" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsFiscalYearMaturityAbstract_019e464b-8574-71a5-95df-c00cf4cf54f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear_019e464b-8574-7bad-9e61-9b778c15b915" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorOperatingLeasePaymentsFiscalYearMaturityAbstract_019e464b-8574-71a5-95df-c00cf4cf54f9" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear_019e464b-8574-7bad-9e61-9b778c15b915" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_019e464b-8574-7e1f-9108-d86d9692f2ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorOperatingLeasePaymentsFiscalYearMaturityAbstract_019e464b-8574-71a5-95df-c00cf4cf54f9" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_019e464b-8574-7e1f-9108-d86d9692f2ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_019e464b-8574-7d9e-bedf-ae6929cc488d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorOperatingLeasePaymentsFiscalYearMaturityAbstract_019e464b-8574-71a5-95df-c00cf4cf54f9" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_019e464b-8574-7d9e-bedf-ae6929cc488d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears_019e464b-8574-7c09-a866-7e5da9b4eedd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorOperatingLeasePaymentsFiscalYearMaturityAbstract_019e464b-8574-71a5-95df-c00cf4cf54f9" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedThreeYears_019e464b-8574-7c09-a866-7e5da9b4eedd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears_019e464b-8574-71cc-958f-9fb118262df3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorOperatingLeasePaymentsFiscalYearMaturityAbstract_019e464b-8574-71a5-95df-c00cf4cf54f9" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedFourYears_019e464b-8574-71cc-958f-9fb118262df3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_LessorOperatingLeasePaymentToBeReceivedAfterYearFour_019e464b-8574-72dd-bb1d-0bcd7c55520f" xlink:href="tlys-20260502.xsd#tlys_LessorOperatingLeasePaymentToBeReceivedAfterYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorOperatingLeasePaymentsFiscalYearMaturityAbstract_019e464b-8574-71a5-95df-c00cf4cf54f9" xlink:to="loc_tlys_LessorOperatingLeasePaymentToBeReceivedAfterYearFour_019e464b-8574-72dd-bb1d-0bcd7c55520f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceived_019e464b-8574-74b1-aea3-cb66f2eb7078" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorOperatingLeasePaymentsFiscalYearMaturityAbstract_019e464b-8574-71a5-95df-c00cf4cf54f9" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceived_019e464b-8574-74b1-aea3-cb66f2eb7078" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesScheduleofLeaseExpenseandSupplementalLeaseInformationDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#SummaryofSignificantAccountingPoliciesScheduleofLeaseExpenseandSupplementalLeaseInformationDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesScheduleofLeaseExpenseandSupplementalLeaseInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019e464b-8574-7f1a-a10f-0c9d388b0ee1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019e464b-8574-7f1a-a10f-0c9d388b0ee1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e464b-8574-7ef4-93c9-a791edf793c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019e464b-8574-7f1a-a10f-0c9d388b0ee1" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e464b-8574-7ef4-93c9-a791edf793c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_019e464b-8574-7ea3-bb84-1f6670244e24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_OperatingLeaseCost_019e464b-8574-7ea3-bb84-1f6670244e24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_019e464b-8574-7a54-a2e3-86f18ca25b41" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_VariableLeaseCost_019e464b-8574-7a54-a2e3-86f18ca25b41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_019e464b-8574-76d7-bd00-dbf5b3644e53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_LeaseCost_019e464b-8574-76d7-bd00-dbf5b3644e53" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_019e464b-8574-7cc8-85af-cae56bd27033" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeasePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_OperatingLeasePayments_019e464b-8574-7cc8-85af-cae56bd27033" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_019e464b-8574-7a79-a51c-744c6130bee0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_019e464b-8574-7a79-a51c-744c6130bee0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_019e464b-8574-7190-9b42-9610737f5e90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_019e464b-8574-7190-9b42-9610737f5e90" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019e464b-8574-7c8e-9dac-ba57e89cea1d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019e464b-8574-7c8e-9dac-ba57e89cea1d" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesScheduleofLeaseExpenseandSupplementalLeaseInformationDetails_1" xlink:type="simple" xlink:href="tlys-20260502.xsd#SummaryofSignificantAccountingPoliciesScheduleofLeaseExpenseandSupplementalLeaseInformationDetails_1"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/SummaryofSignificantAccountingPoliciesScheduleofLeaseExpenseandSupplementalLeaseInformationDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019e464b-8574-7f1a-a10f-0c9d388b0ee1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019e464b-8574-7f1a-a10f-0c9d388b0ee1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_019e464b-8574-7ea3-bb84-1f6670244e24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_OperatingLeaseCost_019e464b-8574-7ea3-bb84-1f6670244e24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_019e464b-8574-7a54-a2e3-86f18ca25b41" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_VariableLeaseCost_019e464b-8574-7a54-a2e3-86f18ca25b41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_019e464b-8574-76d7-bd00-dbf5b3644e53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_LeaseCost_019e464b-8574-76d7-bd00-dbf5b3644e53" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_019e464b-8574-7cc8-85af-cae56bd27033" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeasePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_OperatingLeasePayments_019e464b-8574-7cc8-85af-cae56bd27033" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_019e464b-8574-7a79-a51c-744c6130bee0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_019e464b-8574-7a79-a51c-744c6130bee0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_019e464b-8574-7190-9b42-9610737f5e90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_019e464b-8574-7190-9b42-9610737f5e90" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019e464b-8574-7c8e-9dac-ba57e89cea1d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019e464b-8574-759a-98be-ebdf5da1a97c" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019e464b-8574-7c8e-9dac-ba57e89cea1d" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/MarketableSecuritiesInvestmentsinMarketableSecuritiesDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#MarketableSecuritiesInvestmentsinMarketableSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/MarketableSecuritiesInvestmentsinMarketableSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_tlys_FinancialInstrumentsAndMarketableSecuritiesLineItems_019e464b-8575-7499-ab5f-8dc98c8be915" xlink:href="tlys-20260502.xsd#tlys_FinancialInstrumentsAndMarketableSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_ScheduleOfFinancialInstrumentsAndMarketableSecuritiesTable_019e464b-8575-7051-9206-d230c1e308e3" xlink:href="tlys-20260502.xsd#tlys_ScheduleOfFinancialInstrumentsAndMarketableSecuritiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_tlys_FinancialInstrumentsAndMarketableSecuritiesLineItems_019e464b-8575-7499-ab5f-8dc98c8be915" xlink:to="loc_tlys_ScheduleOfFinancialInstrumentsAndMarketableSecuritiesTable_019e464b-8575-7051-9206-d230c1e308e3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e464b-8575-7bda-a067-6d9b67bcc92f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tlys_ScheduleOfFinancialInstrumentsAndMarketableSecuritiesTable_019e464b-8575-7051-9206-d230c1e308e3" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e464b-8575-7bda-a067-6d9b67bcc92f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-8575-7bda-a067-6d9b67bcc92f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e464b-8575-7bda-a067-6d9b67bcc92f" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-8575-7bda-a067-6d9b67bcc92f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-8575-714c-a4ad-aa96c8eff2d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e464b-8575-7bda-a067-6d9b67bcc92f" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-8575-714c-a4ad-aa96c8eff2d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019e464b-8575-77b0-b60e-2efdbbbd7d97" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-8575-714c-a4ad-aa96c8eff2d1" xlink:to="loc_us-gaap_CommercialPaperMember_019e464b-8575-77b0-b60e-2efdbbbd7d97" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e464b-8575-7b9d-ad7d-7a5961fbf023" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_FinancialInstrumentsAndMarketableSecuritiesLineItems_019e464b-8575-7499-ab5f-8dc98c8be915" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019e464b-8575-7b9d-ad7d-7a5961fbf023" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e464b-8575-7ccb-97ac-f2defe9e3c49" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_FinancialInstrumentsAndMarketableSecuritiesLineItems_019e464b-8575-7499-ab5f-8dc98c8be915" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_019e464b-8575-7ccb-97ac-f2defe9e3c49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019e464b-8575-7de2-8fd0-284fcb738060" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_FinancialInstrumentsAndMarketableSecuritiesLineItems_019e464b-8575-7499-ab5f-8dc98c8be915" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_019e464b-8575-7de2-8fd0-284fcb738060" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e464b-8575-796c-b799-887496549e2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_FinancialInstrumentsAndMarketableSecuritiesLineItems_019e464b-8575-7499-ab5f-8dc98c8be915" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e464b-8575-796c-b799-887496549e2a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/AssetBackedCreditAgreementNarrativeDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#AssetBackedCreditAgreementNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/AssetBackedCreditAgreementNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_019e464b-8575-760d-83a9-3157fc8a297e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_019e464b-8575-760d-83a9-3157fc8a297e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e464b-8575-75c2-a5d2-d971248a8578" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e464b-8575-760d-83a9-3157fc8a297e" xlink:to="loc_us-gaap_CreditFacilityAxis_019e464b-8575-75c2-a5d2-d971248a8578" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e464b-8575-75c2-a5d2-d971248a8578_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e464b-8575-75c2-a5d2-d971248a8578" xlink:to="loc_us-gaap_CreditFacilityDomain_019e464b-8575-75c2-a5d2-d971248a8578_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e464b-8575-78ce-a510-97b677aa9121" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e464b-8575-75c2-a5d2-d971248a8578" xlink:to="loc_us-gaap_CreditFacilityDomain_019e464b-8575-78ce-a510-97b677aa9121" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019e464b-8575-741e-ad06-a9b19931df4b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e464b-8575-78ce-a510-97b677aa9121" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019e464b-8575-741e-ad06-a9b19931df4b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019e464b-8575-731f-8a98-fb9925a91189" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e464b-8575-78ce-a510-97b677aa9121" xlink:to="loc_us-gaap_LetterOfCreditMember_019e464b-8575-731f-8a98-fb9925a91189" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BridgeLoanMember_019e464b-8575-7696-b0c6-ad7e6decf7e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BridgeLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e464b-8575-78ce-a510-97b677aa9121" xlink:to="loc_us-gaap_BridgeLoanMember_019e464b-8575-7696-b0c6-ad7e6decf7e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e464b-8575-7345-bbb3-c6d105614adc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e464b-8575-760d-83a9-3157fc8a297e" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e464b-8575-7345-bbb3-c6d105614adc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e464b-8575-7345-bbb3-c6d105614adc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e464b-8575-7345-bbb3-c6d105614adc" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e464b-8575-7345-bbb3-c6d105614adc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e464b-8575-7e93-825e-2fa6dc230e9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e464b-8575-7345-bbb3-c6d105614adc" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e464b-8575-7e93-825e-2fa6dc230e9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019e464b-8575-79a7-8d73-51981e6c5c62" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e464b-8575-7e93-825e-2fa6dc230e9d" xlink:to="loc_us-gaap_LineOfCreditMember_019e464b-8575-79a7-8d73-51981e6c5c62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019e464b-8575-75ef-83e5-6c8ed28f191f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e464b-8575-760d-83a9-3157fc8a297e" xlink:to="loc_us-gaap_VariableRateAxis_019e464b-8575-75ef-83e5-6c8ed28f191f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019e464b-8575-75ef-83e5-6c8ed28f191f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019e464b-8575-75ef-83e5-6c8ed28f191f" xlink:to="loc_us-gaap_VariableRateDomain_019e464b-8575-75ef-83e5-6c8ed28f191f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019e464b-8575-7144-90ed-d2e88734393a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019e464b-8575-75ef-83e5-6c8ed28f191f" xlink:to="loc_us-gaap_VariableRateDomain_019e464b-8575-7144-90ed-d2e88734393a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019e464b-8575-7865-93ba-d67b35c0ceb0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019e464b-8575-7144-90ed-d2e88734393a" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019e464b-8575-7865-93ba-d67b35c0ceb0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_019e464b-8575-765a-8852-99aa2cea62e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019e464b-8575-7144-90ed-d2e88734393a" xlink:to="loc_us-gaap_BaseRateMember_019e464b-8575-765a-8852-99aa2cea62e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e464b-8575-7472-af74-a38ea12aac25" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e464b-8575-760d-83a9-3157fc8a297e" xlink:to="loc_srt_RangeAxis_019e464b-8575-7472-af74-a38ea12aac25" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e464b-8575-7472-af74-a38ea12aac25_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e464b-8575-7472-af74-a38ea12aac25" xlink:to="loc_srt_RangeMember_019e464b-8575-7472-af74-a38ea12aac25_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e464b-8575-7101-94e5-c5ca95352b72" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e464b-8575-7472-af74-a38ea12aac25" xlink:to="loc_srt_RangeMember_019e464b-8575-7101-94e5-c5ca95352b72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e464b-8575-7725-b5a5-46124fd559aa" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e464b-8575-7101-94e5-c5ca95352b72" xlink:to="loc_srt_MinimumMember_019e464b-8575-7725-b5a5-46124fd559aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e464b-8575-7b54-ba39-e6939090febb" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e464b-8575-7101-94e5-c5ca95352b72" xlink:to="loc_srt_MaximumMember_019e464b-8575-7b54-ba39-e6939090febb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e464b-8575-7f05-aeeb-c0fd55980708" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e464b-8575-760d-83a9-3157fc8a297e" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e464b-8575-7f05-aeeb-c0fd55980708" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e464b-8575-7f05-aeeb-c0fd55980708_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e464b-8575-7f05-aeeb-c0fd55980708" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e464b-8575-7f05-aeeb-c0fd55980708_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e464b-8575-7b04-8bea-2008321b47d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e464b-8575-7f05-aeeb-c0fd55980708" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e464b-8575-7b04-8bea-2008321b47d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_CreditAgreementMember_019e464b-8575-72fd-b960-3133e39d65f4" xlink:href="tlys-20260502.xsd#tlys_CreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e464b-8575-7b04-8bea-2008321b47d8" xlink:to="loc_tlys_CreditAgreementMember_019e464b-8575-72fd-b960-3133e39d65f4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e464b-8575-7bd1-902d-8eb78ecd555f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e464b-8575-7bd1-902d-8eb78ecd555f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019e464b-8575-788b-a8f7-60fd2210d330" xlink:href="tlys-20260502.xsd#tlys_LineOfCreditFacilityAccordionFeatureIncreaseLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_tlys_LineOfCreditFacilityAccordionFeatureIncreaseLimit_019e464b-8575-788b-a8f7-60fd2210d330" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_LineOfCreditBorrowingCapacityCreditCardReceivablePercentage_019e464b-8575-752c-8eaf-fe4f2213c451" xlink:href="tlys-20260502.xsd#tlys_LineOfCreditBorrowingCapacityCreditCardReceivablePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_tlys_LineOfCreditBorrowingCapacityCreditCardReceivablePercentage_019e464b-8575-752c-8eaf-fe4f2213c451" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_LineOfCreditBorrowingCapacityEligibleInventoryPercentage_019e464b-8575-749b-8692-aaec0b3175ef" xlink:href="tlys-20260502.xsd#tlys_LineOfCreditBorrowingCapacityEligibleInventoryPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_tlys_LineOfCreditBorrowingCapacityEligibleInventoryPercentage_019e464b-8575-749b-8692-aaec0b3175ef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_LineOfCreditBorrowingCapacityInventoryInTransitPercentage_019e464b-8575-7a6b-97a7-a9ee53044134" xlink:href="tlys-20260502.xsd#tlys_LineOfCreditBorrowingCapacityInventoryInTransitPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_tlys_LineOfCreditBorrowingCapacityInventoryInTransitPercentage_019e464b-8575-7a6b-97a7-a9ee53044134" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_019e464b-8575-7f5f-8a6f-bd5d5cf92486" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_019e464b-8575-7f5f-8a6f-bd5d5cf92486" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_LineOfCreditFacilityCommitmentFeeAnnualPercentage_019e464b-8575-7bd9-9fdc-322e863d6dfd" xlink:href="tlys-20260502.xsd#tlys_LineOfCreditFacilityCommitmentFeeAnnualPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_tlys_LineOfCreditFacilityCommitmentFeeAnnualPercentage_019e464b-8575-7bd9-9fdc-322e863d6dfd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_DebtInstrumentCreditSpreadAdjustment_019e464b-8575-7443-a3b7-c743af7e1786" xlink:href="tlys-20260502.xsd#tlys_DebtInstrumentCreditSpreadAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_tlys_DebtInstrumentCreditSpreadAdjustment_019e464b-8575-7443-a3b7-c743af7e1786" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019e464b-8575-7a05-a595-f76d7b49030b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019e464b-8575-7a05-a595-f76d7b49030b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_DebtInstrumentFinancialCovenantAvailabilityMinimumPercentageOfTheLoanCap_019e464b-8575-7f94-a829-b0c51a059fa3" xlink:href="tlys-20260502.xsd#tlys_DebtInstrumentFinancialCovenantAvailabilityMinimumPercentageOfTheLoanCap"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_tlys_DebtInstrumentFinancialCovenantAvailabilityMinimumPercentageOfTheLoanCap_019e464b-8575-7f94-a829-b0c51a059fa3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_DebtInstrumentFinancialCovenantAvailabilityMinimumValue_019e464b-8575-7710-8ccf-4aa3a2d8bb6d" xlink:href="tlys-20260502.xsd#tlys_DebtInstrumentFinancialCovenantAvailabilityMinimumValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_tlys_DebtInstrumentFinancialCovenantAvailabilityMinimumValue_019e464b-8575-7710-8ccf-4aa3a2d8bb6d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_019e464b-8575-7398-aebe-8d4645197aeb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_019e464b-8575-7398-aebe-8d4645197aeb" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019e464b-8575-7dd8-8d96-dfb390688cbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_us-gaap_LongTermDebt_019e464b-8575-7dd8-8d96-dfb390688cbb" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_019e464b-8575-780f-93d0-edb92a889de4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e464b-8575-78d3-ac67-a9e4adc79afa" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_019e464b-8575-780f-93d0-edb92a889de4" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/FairValueMeasurementsFinancialAssetsBasedonPriorityofInputstoValuationTechniqueInstrumentsDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#FairValueMeasurementsFinancialAssetsBasedonPriorityofInputstoValuationTechniqueInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/FairValueMeasurementsFinancialAssetsBasedonPriorityofInputstoValuationTechniqueInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e464b-862c-7bf1-91cd-6f2e44a9258e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e464b-862c-78d7-aeee-9d8ae912baca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e464b-862c-7bf1-91cd-6f2e44a9258e" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e464b-862c-78d7-aeee-9d8ae912baca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e464b-862c-7109-a5ce-9bbdd68613f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e464b-862c-78d7-aeee-9d8ae912baca" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e464b-862c-7109-a5ce-9bbdd68613f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e464b-862c-7109-a5ce-9bbdd68613f4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e464b-862c-7109-a5ce-9bbdd68613f4" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e464b-862c-7109-a5ce-9bbdd68613f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e464b-862c-7ca7-9730-c0e49c034f78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e464b-862c-7109-a5ce-9bbdd68613f4" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e464b-862c-7ca7-9730-c0e49c034f78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e464b-862c-7cdb-bbdb-ab30e65f7e71" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e464b-862c-7ca7-9730-c0e49c034f78" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e464b-862c-7cdb-bbdb-ab30e65f7e71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e464b-862c-7111-b1a4-327d8b4a91c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e464b-862c-7ca7-9730-c0e49c034f78" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e464b-862c-7111-b1a4-327d8b4a91c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e464b-862c-7714-8795-5f119b9f70ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e464b-862c-7ca7-9730-c0e49c034f78" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e464b-862c-7714-8795-5f119b9f70ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e464b-862c-7ccb-be35-05b2a7fed48e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e464b-862c-78d7-aeee-9d8ae912baca" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e464b-862c-7ccb-be35-05b2a7fed48e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-862c-7ccb-be35-05b2a7fed48e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e464b-862c-7ccb-be35-05b2a7fed48e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-862c-7ccb-be35-05b2a7fed48e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-862c-75bc-a031-17c9df60a986" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e464b-862c-7ccb-be35-05b2a7fed48e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-862c-75bc-a031-17c9df60a986" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_MoneyMarketInstrumentsMember_019e464b-862c-783c-b32c-d6f75969c1af" xlink:href="tlys-20260502.xsd#tlys_MoneyMarketInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-862c-75bc-a031-17c9df60a986" xlink:to="loc_tlys_MoneyMarketInstrumentsMember_019e464b-862c-783c-b32c-d6f75969c1af" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019e464b-862c-74b6-b273-dbf207893bfe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e464b-862c-75bc-a031-17c9df60a986" xlink:to="loc_us-gaap_CommercialPaperMember_019e464b-862c-74b6-b273-dbf207893bfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e464b-862c-7f99-b691-b5b031115d31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e464b-862c-7bf1-91cd-6f2e44a9258e" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e464b-862c-7f99-b691-b5b031115d31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e464b-862c-74f1-a44d-abb18f774861" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e464b-862c-7bf1-91cd-6f2e44a9258e" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e464b-862c-74f1-a44d-abb18f774861" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Cash_019e464b-862c-7807-9a5b-9c26b6485afc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Cash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e464b-862c-7bf1-91cd-6f2e44a9258e" xlink:to="loc_us-gaap_Cash_019e464b-862c-7807-9a5b-9c26b6485afc" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/ShareBasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#ShareBasedCompensationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/ShareBasedCompensationNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7649-a4d8-e9c9d1ae759a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7649-a4d8-e9c9d1ae759a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019e464b-862c-7bdb-8546-3fed94fbaa9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7649-a4d8-e9c9d1ae759a" xlink:to="loc_us-gaap_PlanNameAxis_019e464b-862c-7bdb-8546-3fed94fbaa9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e464b-862c-7bdb-8546-3fed94fbaa9d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019e464b-862c-7bdb-8546-3fed94fbaa9d" xlink:to="loc_us-gaap_PlanNameDomain_019e464b-862c-7bdb-8546-3fed94fbaa9d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019e464b-862c-7f13-8023-47bc06b743cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019e464b-862c-7bdb-8546-3fed94fbaa9d" xlink:to="loc_us-gaap_PlanNameDomain_019e464b-862c-7f13-8023-47bc06b743cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_StockIncentivePlanTwentyTwelveMember_019e464b-862c-7e62-88be-ae068db9ae4b" xlink:href="tlys-20260502.xsd#tlys_StockIncentivePlanTwentyTwelveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019e464b-862c-7f13-8023-47bc06b743cc" xlink:to="loc_tlys_StockIncentivePlanTwentyTwelveMember_019e464b-862c-7e62-88be-ae068db9ae4b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e464b-862c-7a82-98c6-386d1be98ad8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7649-a4d8-e9c9d1ae759a" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e464b-862c-7a82-98c6-386d1be98ad8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-862c-7a82-98c6-386d1be98ad8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-862c-7a82-98c6-386d1be98ad8" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-862c-7a82-98c6-386d1be98ad8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-862c-7c03-9609-d0c4dd97545e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-862c-7a82-98c6-386d1be98ad8" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-862c-7c03-9609-d0c4dd97545e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e464b-862c-7f9c-8f3f-29b81f24cd51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e464b-862c-7c03-9609-d0c4dd97545e" xlink:to="loc_us-gaap_CommonClassAMember_019e464b-862c-7f9c-8f3f-29b81f24cd51" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e464b-862c-747f-bd6f-372b3a3bfc2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7649-a4d8-e9c9d1ae759a" xlink:to="loc_us-gaap_AwardTypeAxis_019e464b-862c-747f-bd6f-372b3a3bfc2d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-747f-bd6f-372b3a3bfc2d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019e464b-862c-747f-bd6f-372b3a3bfc2d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-747f-bd6f-372b3a3bfc2d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-7462-8829-b07e07696449" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019e464b-862c-747f-bd6f-372b3a3bfc2d" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-7462-8829-b07e07696449" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019e464b-862c-7ece-99c9-384a848d1194" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-7462-8829-b07e07696449" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019e464b-862c-7ece-99c9-384a848d1194" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019e464b-862c-74e7-8757-546ba21da326" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-7462-8829-b07e07696449" xlink:to="loc_us-gaap_RestrictedStockMember_019e464b-862c-74e7-8757-546ba21da326" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_StockOptionsTimeBasedMember_019e7507-da1f-76b7-bd94-2321351acce1" xlink:href="tlys-20260502.xsd#tlys_StockOptionsTimeBasedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-7462-8829-b07e07696449" xlink:to="loc_tlys_StockOptionsTimeBasedMember_019e7507-da1f-76b7-bd94-2321351acce1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_StockOptionsPerformanceBasedMember_019e7509-edd7-7132-b5f3-866763b35b2b" xlink:href="tlys-20260502.xsd#tlys_StockOptionsPerformanceBasedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-7462-8829-b07e07696449" xlink:to="loc_tlys_StockOptionsPerformanceBasedMember_019e7509-edd7-7132-b5f3-866763b35b2b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019e464b-862c-7e82-892b-b602fddce1c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7649-a4d8-e9c9d1ae759a" xlink:to="loc_us-gaap_VestingAxis_019e464b-862c-7e82-892b-b602fddce1c3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019e464b-862c-7e82-892b-b602fddce1c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_019e464b-862c-7e82-892b-b602fddce1c3" xlink:to="loc_us-gaap_VestingDomain_019e464b-862c-7e82-892b-b602fddce1c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019e464b-862c-709f-9453-375879291806" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_019e464b-862c-7e82-892b-b602fddce1c3" xlink:to="loc_us-gaap_VestingDomain_019e464b-862c-709f-9453-375879291806" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019e464b-862c-79cc-9a3f-2441f8ab74e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019e464b-862c-709f-9453-375879291806" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019e464b-862c-79cc-9a3f-2441f8ab74e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019e464b-862c-7257-b59c-586e8521d513" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019e464b-862c-709f-9453-375879291806" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019e464b-862c-7257-b59c-586e8521d513" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_019e464b-862c-76cb-a717-2df9ce5efe41" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationAwardTrancheThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019e464b-862c-709f-9453-375879291806" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_019e464b-862c-76cb-a717-2df9ce5efe41" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_ShareBasedPaymentArrangementTrancheFourMember_019e464b-862c-7bca-b72d-7dacef233cd1" xlink:href="tlys-20260502.xsd#tlys_ShareBasedPaymentArrangementTrancheFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019e464b-862c-709f-9453-375879291806" xlink:to="loc_tlys_ShareBasedPaymentArrangementTrancheFourMember_019e464b-862c-7bca-b72d-7dacef233cd1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_019e464b-862c-7d1f-b0a7-f3d914536348" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7649-a4d8-e9c9d1ae759a" xlink:to="loc_srt_TitleOfIndividualAxis_019e464b-862c-7d1f-b0a7-f3d914536348" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019e464b-862c-7d1f-b0a7-f3d914536348_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_019e464b-862c-7d1f-b0a7-f3d914536348" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019e464b-862c-7d1f-b0a7-f3d914536348_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019e464b-862c-71ad-bafb-1e582deca157" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_019e464b-862c-7d1f-b0a7-f3d914536348" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019e464b-862c-71ad-bafb-1e582deca157" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_DirectorsMember_019e464b-862c-7231-bfa4-56ff0ecdbf4c" xlink:href="tlys-20260502.xsd#tlys_DirectorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019e464b-862c-71ad-bafb-1e582deca157" xlink:to="loc_tlys_DirectorsMember_019e464b-862c-7231-bfa4-56ff0ecdbf4c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_CertainEmployeesMember_019e464b-862c-777c-af3a-b49110148f52" xlink:href="tlys-20260502.xsd#tlys_CertainEmployeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019e464b-862c-71ad-bafb-1e582deca157" xlink:to="loc_tlys_CertainEmployeesMember_019e464b-862c-777c-af3a-b49110148f52" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ChiefExecutiveOfficerMember_019e7507-2650-7016-8788-67a2e013ec6a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ChiefExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019e464b-862c-71ad-bafb-1e582deca157" xlink:to="loc_srt_ChiefExecutiveOfficerMember_019e7507-2650-7016-8788-67a2e013ec6a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019e464b-862c-78e5-8173-d1abd4748cbd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_019e464b-862c-78e5-8173-d1abd4748cbd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019e464b-862c-72ff-8a73-4faf88aacb91" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_019e464b-862c-72ff-8a73-4faf88aacb91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019e464b-862c-7548-951e-5cf5876dd5a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019e464b-862c-7548-951e-5cf5876dd5a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019e464b-862c-7575-8607-ddab7917857e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019e464b-862c-7575-8607-ddab7917857e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019e464b-862c-7f8b-b360-e3cd68ff703e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_019e464b-862c-7f8b-b360-e3cd68ff703e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019e7506-a1d3-7d5e-b444-87cdd5ec315b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019e7506-a1d3-7d5e-b444-87cdd5ec315b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingStockPriceTargetAchievementConsecutiveTradingDayTrailingAverageStockClosingPrice_019e750a-c1c0-74ba-894d-3ea505d0c998" xlink:href="tlys-20260502.xsd#tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingStockPriceTargetAchievementConsecutiveTradingDayTrailingAverageStockClosingPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingStockPriceTargetAchievementConsecutiveTradingDayTrailingAverageStockClosingPrice_019e750a-c1c0-74ba-894d-3ea505d0c998" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestBasedOnMarketConditionsGrantDateFairValue_019e750e-9fc1-7fdc-8cc5-7124a7325bd9" xlink:href="tlys-20260502.xsd#tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestBasedOnMarketConditionsGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestBasedOnMarketConditionsGrantDateFairValue_019e750e-9fc1-7fdc-8cc5-7124a7325bd9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_PercentageOfAwardsVestingOnGrantDate_019e464b-862c-722e-925c-60ffddeea063" xlink:href="tlys-20260502.xsd#tlys_PercentageOfAwardsVestingOnGrantDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_tlys_PercentageOfAwardsVestingOnGrantDate_019e464b-862c-722e-925c-60ffddeea063" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019e464b-862c-7219-bf2d-919b24bf40f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019e464b-862c-7219-bf2d-919b24bf40f1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019e464b-862c-7874-a2ff-691948b923d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76b6-be1c-5559dc361c50" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019e464b-862c-7874-a2ff-691948b923d6" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/ShareBasedCompensationStockOptionActivityUnderStockOptionPlanDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#ShareBasedCompensationStockOptionActivityUnderStockOptionPlanDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/ShareBasedCompensationStockOptionActivityUnderStockOptionPlanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a37-86cf-8e104d2f32d7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7203-b74a-87c7cf098f52" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a37-86cf-8e104d2f32d7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7203-b74a-87c7cf098f52" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e464b-862c-7811-8c75-3603599ea471" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7203-b74a-87c7cf098f52" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e464b-862c-7811-8c75-3603599ea471" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-862c-7811-8c75-3603599ea471_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-862c-7811-8c75-3603599ea471" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-862c-7811-8c75-3603599ea471_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e464b-862c-743f-a56e-7b27e42f1dcf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e464b-862c-7811-8c75-3603599ea471" xlink:to="loc_us-gaap_ClassOfStockDomain_019e464b-862c-743f-a56e-7b27e42f1dcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019e464b-862c-75cc-8c90-96c05b418569" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e464b-862c-743f-a56e-7b27e42f1dcf" xlink:to="loc_us-gaap_CommonClassAMember_019e464b-862c-75cc-8c90-96c05b418569" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019e464b-862c-73df-b2fe-2aee13753c63" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a37-86cf-8e104d2f32d7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019e464b-862c-73df-b2fe-2aee13753c63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019e464b-862c-79e0-81fe-dbbe4b518cf8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019e464b-862c-73df-b2fe-2aee13753c63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019e464b-862c-79e0-81fe-dbbe4b518cf8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019e464b-862c-77c4-9377-43a15e14ade3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019e464b-862c-73df-b2fe-2aee13753c63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019e464b-862c-77c4-9377-43a15e14ade3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019e74d6-50ff-750a-a081-7d7c8b70aafd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019e464b-862c-73df-b2fe-2aee13753c63" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019e74d6-50ff-750a-a081-7d7c8b70aafd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_019e464b-862c-768b-8e8e-0339602b9eb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019e464b-862c-73df-b2fe-2aee13753c63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_019e464b-862c-768b-8e8e-0339602b9eb5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_019e464b-862c-75a6-80bc-b623fd4b6817" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019e464b-862c-73df-b2fe-2aee13753c63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_019e464b-862c-75a6-80bc-b623fd4b6817" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_019e464b-862c-7070-abcd-14411db127ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_019e464b-862c-7ced-b394-d74de92e04c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_019e464b-862c-73df-b2fe-2aee13753c63" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_019e464b-862c-7ced-b394-d74de92e04c6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019e464b-862c-7cc1-a53b-a43fb74b53ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a37-86cf-8e104d2f32d7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019e464b-862c-7cc1-a53b-a43fb74b53ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019e464b-862c-7b9d-ab27-6649f8d83acf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019e464b-862c-7cc1-a53b-a43fb74b53ca" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019e464b-862c-7b9d-ab27-6649f8d83acf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_019e464b-862c-719a-b84b-91bdee3a2c8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019e464b-862c-7cc1-a53b-a43fb74b53ca" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_019e464b-862c-719a-b84b-91bdee3a2c8a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_019e74d7-bc4d-7f87-a603-056f644d5ef5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019e464b-862c-7cc1-a53b-a43fb74b53ca" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_019e74d7-bc4d-7f87-a603-056f644d5ef5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_019e464b-862c-7b04-87b0-68bfc63d4584" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019e464b-862c-7cc1-a53b-a43fb74b53ca" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_019e464b-862c-7b04-87b0-68bfc63d4584" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_019e464b-862c-7d43-9f6b-75f96b77c686" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019e464b-862c-7cc1-a53b-a43fb74b53ca" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_019e464b-862c-7d43-9f6b-75f96b77c686" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_019e464b-862c-7712-a519-993cb6a975fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_019e464b-862c-729d-a03d-9327187bc7e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_019e464b-862c-7cc1-a53b-a43fb74b53ca" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_019e464b-862c-729d-a03d-9327187bc7e4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019e464b-862c-7034-824c-332f8c88190a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a37-86cf-8e104d2f32d7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019e464b-862c-7034-824c-332f8c88190a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019e464b-862c-7f1f-87d2-078c6beffac5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019e464b-862c-7034-824c-332f8c88190a" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_019e464b-862c-7f1f-87d2-078c6beffac5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_019e464b-862c-7572-ac85-3380fcdcfe60" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_019e464b-862c-7034-824c-332f8c88190a" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_019e464b-862c-7572-ac85-3380fcdcfe60" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_019e464b-862c-7119-b0a7-a54a934ff657" xlink:href="tlys-20260502.xsd#tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a37-86cf-8e104d2f32d7" xlink:to="loc_tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_019e464b-862c-7119-b0a7-a54a934ff657" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019e464b-862c-7760-9d15-a6c13ecf9fb6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_019e464b-862c-7119-b0a7-a54a934ff657" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_019e464b-862c-7760-9d15-a6c13ecf9fb6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_019e464b-862c-7667-ae9a-2ee103a12064" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract_019e464b-862c-7119-b0a7-a54a934ff657" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_019e464b-862c-7667-ae9a-2ee103a12064" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharePrice_019e464b-862c-7ce6-9786-350ded244cf5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a37-86cf-8e104d2f32d7" xlink:to="loc_us-gaap_SharePrice_019e464b-862c-7ce6-9786-350ded244cf5" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/ShareBasedCompensationSummaryofStatusofNonVestedRestrictedStockDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#ShareBasedCompensationSummaryofStatusofNonVestedRestrictedStockDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/ShareBasedCompensationSummaryofStatusofNonVestedRestrictedStockDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a6d-b765-6b2ca9a1ed12" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7772-9053-bc71fb846037" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a6d-b765-6b2ca9a1ed12" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7772-9053-bc71fb846037" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019e464b-862c-70dc-8346-829fcde95d09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-7772-9053-bc71fb846037" xlink:to="loc_us-gaap_AwardTypeAxis_019e464b-862c-70dc-8346-829fcde95d09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-70dc-8346-829fcde95d09_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019e464b-862c-70dc-8346-829fcde95d09" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-70dc-8346-829fcde95d09_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-79b6-81eb-2bdf16dacc89" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019e464b-862c-70dc-8346-829fcde95d09" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-79b6-81eb-2bdf16dacc89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_NonVestedMember_019e464b-862c-7c7b-950f-1f5769c5841c" xlink:href="tlys-20260502.xsd#tlys_NonVestedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019e464b-862c-79b6-81eb-2bdf16dacc89" xlink:to="loc_tlys_NonVestedMember_019e464b-862c-7c7b-950f-1f5769c5841c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e464b-862c-71e2-bcf1-bbb734a8cce5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a6d-b765-6b2ca9a1ed12" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e464b-862c-71e2-bcf1-bbb734a8cce5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e464b-862c-7d25-b7d2-82d66d99b9d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e464b-862c-71e2-bcf1-bbb734a8cce5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e464b-862c-7d25-b7d2-82d66d99b9d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e464b-862c-7aec-801b-8e80214b973c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e464b-862c-71e2-bcf1-bbb734a8cce5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019e464b-862c-7aec-801b-8e80214b973c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019e464b-862c-70c3-ab67-fafe2ae6fc6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_019e464b-862c-71e2-bcf1-bbb734a8cce5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_019e464b-862c-70c3-ab67-fafe2ae6fc6d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_019e464b-862c-7418-825e-8a4dd020c169" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e464b-862c-77a3-80f2-9f1d799487b1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-7a6d-b765-6b2ca9a1ed12" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e464b-862c-77a3-80f2-9f1d799487b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e464b-862c-790c-bce6-eebddcb3ee11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e464b-862c-77a3-80f2-9f1d799487b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e464b-862c-790c-bce6-eebddcb3ee11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019e464b-862c-76e8-93b1-f9ab7c46afcd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e464b-862c-77a3-80f2-9f1d799487b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_019e464b-862c-76e8-93b1-f9ab7c46afcd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019e464b-862c-70ba-92d1-7e3b65998582" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_019e464b-862c-77a3-80f2-9f1d799487b1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_019e464b-862c-70ba-92d1-7e3b65998582" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_019e464b-862c-78d0-b34e-ae61755bc28c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/ShareBasedCompensationScheduleofStockBasedCompensationDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#ShareBasedCompensationScheduleofStockBasedCompensationDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/ShareBasedCompensationScheduleofStockBasedCompensationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76fe-8a65-fd663ada1635" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-79c1-aa2a-25a0c51f93c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76fe-8a65-fd663ada1635" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-79c1-aa2a-25a0c51f93c3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e464b-862c-75c6-92c9-1e3c6ee1d15b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-79c1-aa2a-25a0c51f93c3" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e464b-862c-75c6-92c9-1e3c6ee1d15b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019e464b-862c-7782-96a5-da06d3af2db7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76fe-8a65-fd663ada1635" xlink:to="loc_us-gaap_ShareBasedCompensation_019e464b-862c-7782-96a5-da06d3af2db7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/ShareBasedCompensationScheduleofStockBasedCompensationDetails_1" xlink:type="simple" xlink:href="tlys-20260502.xsd#ShareBasedCompensationScheduleofStockBasedCompensationDetails_1"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/ShareBasedCompensationScheduleofStockBasedCompensationDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76fe-8a65-fd663ada1635" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-79c1-aa2a-25a0c51f93c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76fe-8a65-fd663ada1635" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019e464b-862c-79c1-aa2a-25a0c51f93c3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019e464b-862c-7782-96a5-da06d3af2db7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019e464b-862c-76fe-8a65-fd663ada1635" xlink:to="loc_us-gaap_ShareBasedCompensation_019e464b-862c-7782-96a5-da06d3af2db7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/NetLossPerShareComponentsofBasicandDilutedEarningsPerShareDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#NetLossPerShareComponentsofBasicandDilutedEarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/NetLossPerShareComponentsofBasicandDilutedEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems_019e464b-862c-7e3c-8e40-7abd2127fcd6" xlink:href="tlys-20260502.xsd#tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable_019e464b-862c-70a5-94f3-6a32983f84a7" xlink:href="tlys-20260502.xsd#tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems_019e464b-862c-7e3c-8e40-7abd2127fcd6" xlink:to="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable_019e464b-862c-70a5-94f3-6a32983f84a7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e464b-862c-7385-8939-fb767a5e9bfe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassTable_019e464b-862c-70a5-94f3-6a32983f84a7" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e464b-862c-7385-8939-fb767a5e9bfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e464b-862c-7385-8939-fb767a5e9bfe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e464b-862c-7385-8939-fb767a5e9bfe" xlink:to="loc_us-gaap_EquityComponentDomain_019e464b-862c-7385-8939-fb767a5e9bfe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e464b-862c-7fcd-b6f1-6591e4790027" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e464b-862c-7385-8939-fb767a5e9bfe" xlink:to="loc_us-gaap_EquityComponentDomain_019e464b-862c-7fcd-b6f1-6591e4790027" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_CommonClassAAndClassBMember_019e464b-862c-764f-9773-805125936ba2" xlink:href="tlys-20260502.xsd#tlys_CommonClassAAndClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e464b-862c-7fcd-b6f1-6591e4790027" xlink:to="loc_tlys_CommonClassAAndClassBMember_019e464b-862c-764f-9773-805125936ba2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e464b-862c-7a76-9717-b18d31939af3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems_019e464b-862c-7e3c-8e40-7abd2127fcd6" xlink:to="loc_us-gaap_NetIncomeLoss_019e464b-862c-7a76-9717-b18d31939af3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e464b-862c-7c7b-b202-e5fc2f2a2635" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems_019e464b-862c-7e3c-8e40-7abd2127fcd6" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019e464b-862c-7c7b-b202-e5fc2f2a2635" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019e464b-862c-71de-be8b-2a1ad015d720" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems_019e464b-862c-7e3c-8e40-7abd2127fcd6" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019e464b-862c-71de-be8b-2a1ad015d720" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e464b-862c-7203-adae-3f5e4a8ede91" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems_019e464b-862c-7e3c-8e40-7abd2127fcd6" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019e464b-862c-7203-adae-3f5e4a8ede91" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019e464b-862c-77d0-9840-4e49ce4f9f07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems_019e464b-862c-7e3c-8e40-7abd2127fcd6" xlink:to="loc_us-gaap_EarningsPerShareBasic_019e464b-862c-77d0-9840-4e49ce4f9f07" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019e464b-862c-7e27-bc8c-f3119a394445" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tlys_ScheduleOfEarningsPerShareBasicAndDilutedByCommonClassLineItems_019e464b-862c-7e3c-8e40-7abd2127fcd6" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019e464b-862c-7e27-bc8c-f3119a394445" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/NetLossPerShareScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#NetLossPerShareScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/NetLossPerShareScheduleofAntidilutiveSecuritiesExcludedfromComputationofEarningsPerShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e464b-862c-7643-a806-f3fcdbfed0fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e464b-862c-77d8-99f4-2ce1f0ea930b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e464b-862c-7643-a806-f3fcdbfed0fd" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e464b-862c-77d8-99f4-2ce1f0ea930b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e464b-862c-7937-8a30-64c1929ba436" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019e464b-862c-77d8-99f4-2ce1f0ea930b" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e464b-862c-7937-8a30-64c1929ba436" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e464b-862c-7937-8a30-64c1929ba436_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e464b-862c-7937-8a30-64c1929ba436" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e464b-862c-7937-8a30-64c1929ba436_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e464b-862c-745a-a546-a749fc2234e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019e464b-862c-7937-8a30-64c1929ba436" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e464b-862c-745a-a546-a749fc2234e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019e464b-862c-7509-8596-10ea14327437" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e464b-862c-745a-a546-a749fc2234e2" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019e464b-862c-7509-8596-10ea14327437" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_019e464b-862c-74ce-812c-3596dbd7818d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019e464b-862c-745a-a546-a749fc2234e2" xlink:to="loc_us-gaap_RestrictedStockMember_019e464b-862c-74ce-812c-3596dbd7818d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e464b-862c-76c9-929c-32c68eec672b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019e464b-862c-7643-a806-f3fcdbfed0fd" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019e464b-862c-76c9-929c-32c68eec672b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.tillys.com/role/SegmentInformationDetails" xlink:type="simple" xlink:href="tlys-20260502.xsd#SegmentInformationDetails"/>
  <link:definitionLink xlink:role="http://www.tillys.com/role/SegmentInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e464b-862d-780f-b4f9-be63c577967b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e464b-862d-780f-b4f9-be63c577967b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e464b-862d-7051-be9c-32021bcc01b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e464b-862d-780f-b4f9-be63c577967b" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e464b-862d-7051-be9c-32021bcc01b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e464b-862d-7051-be9c-32021bcc01b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e464b-862d-7051-be9c-32021bcc01b8" xlink:to="loc_us-gaap_SegmentDomain_019e464b-862d-7051-be9c-32021bcc01b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e464b-862d-77d0-9748-7b1f7f445afd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e464b-862d-7051-be9c-32021bcc01b8" xlink:to="loc_us-gaap_SegmentDomain_019e464b-862d-77d0-9748-7b1f7f445afd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_ReportableSegmentMember_019e464b-862d-793a-a10c-5eaf2e41f377" xlink:href="tlys-20260502.xsd#tlys_ReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e464b-862d-77d0-9748-7b1f7f445afd" xlink:to="loc_tlys_ReportableSegmentMember_019e464b-862d-793a-a10c-5eaf2e41f377" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019e464b-862d-7d57-aca8-0fd747b16512" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_Revenues_019e464b-862d-7d57-aca8-0fd747b16512" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_CostOfGoodsAndServicesSoldProduct_019e464b-862d-72b8-9cc2-f2a191b3612f" xlink:href="tlys-20260502.xsd#tlys_CostOfGoodsAndServicesSoldProduct"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_tlys_CostOfGoodsAndServicesSoldProduct_019e464b-862d-72b8-9cc2-f2a191b3612f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_CostOfGoodsSoldOperatingLeaseChargesAndDepreciationExpense_019e464b-862d-7bac-abef-ce07996c8759" xlink:href="tlys-20260502.xsd#tlys_CostOfGoodsSoldOperatingLeaseChargesAndDepreciationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_tlys_CostOfGoodsSoldOperatingLeaseChargesAndDepreciationExpense_019e464b-862d-7bac-abef-ce07996c8759" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tlys_CostOfGoodsAndServicesSoldOther_019e464b-862d-7b9e-8bb4-60f5f490ed5a" xlink:href="tlys-20260502.xsd#tlys_CostOfGoodsAndServicesSoldOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_tlys_CostOfGoodsAndServicesSoldOther_019e464b-862d-7b9e-8bb4-60f5f490ed5a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019e464b-862d-77ab-8093-811814ed9e95" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_GrossProfit_019e464b-862d-77ab-8093-811814ed9e95" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_019e464b-862d-779b-9b39-9eae7ebc5303" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_LaborAndRelatedExpense_019e464b-862d-779b-9b39-9eae7ebc5303" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingExpense_019e464b-862d-74d7-8912-785d8816bc80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_MarketingExpense_019e464b-862d-74d7-8912-785d8816bc80" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingExpense_019e464b-862d-7f06-936f-86b768a8bf3b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_SellingExpense_019e464b-862d-7f06-936f-86b768a8bf3b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherGeneralExpense_019e464b-862d-7221-9b4b-7ae3fba7d898" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherGeneralExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_OtherGeneralExpense_019e464b-862d-7221-9b4b-7ae3fba7d898" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e464b-862d-714d-912e-cdfd505862fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e464b-862d-714d-912e-cdfd505862fb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019e464b-862d-701f-b122-3b442296321d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019e464b-862d-701f-b122-3b442296321d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e464b-862d-7411-a752-d665b104eae1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e464b-862d-7411-a752-d665b104eae1" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e464b-862d-74d1-a03b-788be45e07da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e464b-862d-745f-a0bf-72de78c10423" xlink:to="loc_us-gaap_NetIncomeLoss_019e464b-862d-74d1-a03b-788be45e07da" xlink:type="arc" order="12"/>
  </link:definitionLink>
</link:linkbase>
