Attire to wear on formal occasions in the evening(noun)
WordNet. Princeton University. 2010.
Use "evening clothes" in a sentence
"It depicted with relentless pathos the drunkard's progress; beginning with his conversion to beer in the company of loose travelling men; pursuing him through an inexplicable lapse into evening clothes and the society of some remarkably painful ladies, next, exhibiting the effects of alcohol on the victim's domestic disposition, the unfortunate man was seen in the act of striking his wife and, subsequently, his pleading baby daughter with an abnormally heavy walking-stick."
"The serious ones dress up in evening clothes and go off to the Pally to show off before a lot of girls and dance these new Charlestons and what not."
"He carried his bath-tub, his immaculate linen, his evening clothes, his war equipment -- in which he had the pride of a connoisseur -- wherever he went, and, what is more, he had the courage to use the evening clothes at times when their use was conspicuous."