Meaning of “one-piece” in the English Dictionary

british dictionary

"one-piece" in British English

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one-piecenoun [ C ]

uk /ˈwʌn.piːs/ us /ˈwʌn.piːs/ US usually one-piece swimsuit

a piece of women's clothing that is worn when swimming or on a beach and consists of a single piece of material rather than a separate top and bottom:

I'd prefer a one-piece to a bikini.

(Definition of “one-piece” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)