evening wear

This term refers to a specific category of formal attire, typically encompassing gowns, tuxedos, and cocktail dresses. It carries a connotation of prestige and strict adherence to social etiquette, distinguishing it from "smart casual" or "business attire."

Grammatically, this is an uncountable noun. It describes a collective category of clothing rather than individual garments. Consequently, it cannot be pluralized as "evening wears." To refer to specific items, one must use partitive constructions such as "a piece of evening wear" or "an item of evening wear."