evening gown
US /ˈiːv.nɪŋ ˌɡaʊn/
UK /ˈiːv.nɪŋ ˌɡaʊn/
1.
a long formal dress worn by women for special occasions in the evening
:
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She looked stunning in her elegant evening gown.
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The designer showcased a new collection of evening gowns.
a long formal dress worn by women for special occasions in the evening