onesie

noun

one·​sie ˈwən-zē How to pronounce onesie (audio)
plural onesies
1
: a bodysuit for an infant having a snap closure at the crotch and not covering the legs
… her husband, Prince William, gratefully accepted a onesie labeled "Daddy's Little Co-Pilot" from a well-wisher …Michelle Tauber et al.
2
: a one-piece garment for adults usually with long sleeves and pants and sometimes with a hood
… pole-vaulter Holly Bradshaw wore a onesie rather than a crop top and bikini to win her bronze …Vanessa Friedman

Examples of onesie in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
After the game, Bryant greeted Cowboys fans at the stadium, and even signed a baby's onesie. Natasha Dye, PEOPLE, 4 Nov. 2025 To create the costume, Sisto took a sheep onesie and cut the head off of it. Julia Gomez, USA Today, 23 Oct. 2025 The baby was seen in a blue onesie. Jason Pham, StyleCaster, 23 Oct. 2025 Besides, who doesn’t love a onesie? Stephanie McNeal, Glamour, 22 Oct. 2025 See All Example Sentences for onesie

Word History

Etymology

one entry 1 + -sie (after the trademark Onesies)

First Known Use

1983, in the meaning defined at sense 1

Time Traveler
The first known use of onesie was in 1983

Browse Nearby Words

Cite this Entry

“Onesie.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/onesie. Accessed 7 Nov. 2025.

Last Updated: - Updated example sentences
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