one-piece
adjectiveUK /ˌwʌnˈpiːs/
US /ˌwʌnˈpiːs/
Made as a single whole thing, not in separate parts.
She wore a one-piece swimsuit to the beach.
RELATED WORDS
OTHER MEANINGS
2. A swimsuit made as one single piece rather than two.
He packed a one-piece for the pool.
3. Made from a single continuous piece of material.
The chair has a one-piece plastic shell.
4. A garment or outfit that is all connected as one item.
The baby wore a cozy one-piece to bed.