wedding gown
US /ˈwed.ɪŋ ˌɡaʊn/
UK /ˈwed.ɪŋ ˌɡaʊn/

1.
a formal dress worn by a bride on her wedding day
:
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She looked stunning in her white wedding gown.
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Finding the perfect wedding gown was her top priority.
a formal dress worn by a bride on her wedding day