onesie /ˈwʌn.zi/noun 4forms 1phrases 1 noun4 •Any of various one-piece attires. •(US) A one-piece garment for an infant or small child, generally worn over a diaper.The Fever shared a video of the meeting on X (formerly known as Twitter), where an excited Clark got to hold the young baby and sign the youngster's onesie. — 2024 •A one-piece adult loungewear jumpsuit. •A one-piece fashionable streetwear worn mostly by teenagers. formsonesies Phrases with onesie onesie-twosieIndividually or in very small groups, rather than in larger batches.
