evening dress

US /ˈiːv.nɪŋ ˌdres/
UK /ˈiːv.nɪŋ ˌdres/
"evening dress" picture
1.

a woman's formal dress, especially one worn for an evening event or ball

:
She wore a stunning red evening dress to the gala.
The boutique specializes in bridal gowns and evening dresses.