Definition of onesie in English:

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onesie

Pronunciation: /ˈwʌnzi/

noun

1A loose-fitting one-piece leisure garment covering the torso and legs: I’d had a bath and was in my onesie ready to settle down for yet another reality TV marathon
More example sentences
  • I have often fantasized about living my entire indoor life in a cashmere onesie, with snaps up the front and footie slippers attached.
  • The staple denim cut-offs and printed dresses and "onesies" are spot-on for festival goers.
  • The group is fond of sporting zip-up mechanic's uniforms onstage, or "onesies," as drummer Melissa York lovingly refers to them.
2North American A one-piece close-fitting lightweight garment worn by a young child, usually having sleeves but leaving the legs uncovered and fastening with press studs at the crotch.
Example sentences
  • One vendor was even selling a baby's pink onesie emblazoned with the New York Police Department logo.
  • These days you can buy your baby daughter a BORN TO SHOP onesie with little pink purses on it.
  • As you can tell from his onesie, I exclusively breastfeed.

Origin

1980s: from Onesies, a proprietary name for a garment of this type, based on one + -sy.

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