onesie.
Any of various one-piece attires:
Meaning & usage
Any of various one-piece attires: A one-piece garment for an infant or small child, generally worn over a diaper.
Any of various one-piece attires: A one-piece adult loungewear jumpsuit.
Any of various one-piece attires: A one-piece fashionable streetwear worn mostly by teenagers.
Where this word comes from
Genericized trademark from the Gerber Childrenswear brand name Onesies, which became reinterpreted as a plural. Equivalent to one + -sie.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.