riding habit
US /ˈraɪdɪŋ ˌhæbɪt/
UK /ˈraɪdɪŋ ˌhæbɪt/
1.
a woman's riding costume, typically consisting of a tailored jacket and a long skirt or breeches
:
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She wore a traditional green riding habit for the equestrian event.
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The museum displayed an antique riding habit from the 19th century.