noun[ C ]uk/ˈwʌn.piːs/us/ˈwʌn.piːs/(US usually one-piece swimsuit)
一件式泳装，连体泳衣
a piece of clothing worn when swimming or on a beach, especially by women and girls, consisting of a single piece of material rather than a separate top and bottom
I'd prefer a one-piece to a bikini.跟比基尼相比，我更喜欢连体式泳装。