Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
one-piece is an adjective meaning "(of clothing) consisting of or fashioned in a single whole piece". It carries one recorded sense.
(of clothing) consisting of or fashioned in a single whole piece
“a one-piece garment”
Definitions, synonyms and semantic relations for one-piece come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.