Definition of onesie in English:

Share this entry


Pronunciation: /ˈwənzē/


North American An infant’s one-piece close-fitting lightweight garment, usually having sleeves but leaving the legs uncovered and fastening with snaps 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.


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

For editors and proofreaders

Syllabification: one·sie

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.