maid dress; maid outfit
Refers to the stereotypical maid costume, often associated with cosplay, themed cafés, or anime/game characters. Not a practical cleaning uniform.
She wore a maid outfit to the cosplay event.
At that maid café, all the staff wear maid dresses.
Compound of メイド (maid, from English) and 服 (clothing). A modern term for the stylized maid costume popular in Japanese subcultures.