formal or semiformal attire for evening wear.
attire for wearing at a formal occasion during the evening, esp (for men) a dinner jacket and black tie, or (less commonly, for women) a floor-length gown
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
On the ship, expect an evening dress code in the main dining room.
They were in evening dress, had been dining somewhere, and were going on to a music-hall.
For an evening dress, payments stretch to ten months, interest-free.
Formal entertainment is rare at the post and evening dress is not necessary.
Evening dress always predominates on these occasions.
No one was allowed to attend in a dress suit or evening dress.
She came down into the moonlight, her rich evening dress over her arm, her face cool mid sweet.