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
All eyes were on Pharrell Williams' wife, Helen Lasichanh, during the Met Gala on May 1, but it was for all the wrong reasons. We were hoping Helen would show off her amazing post-baby body after birthing triplets, but instead, she covered her body in a giant red onesie that some Twitter users were comparing to the red Teletubbie!Christopher Rogers

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.
The sweet post featured a photo of the newborn wearing a knit onesie with her name on it, along with a big pink bow on her head. Charlotte Phillipp, People.com, 31 July 2025 On the other side of town, Whitney is hours away from going into labor and grabbing some last-minute spooky-season onesies. Olivia Crandall, Vulture, 15 May 2025 In the photo, Spieth and his children's hands can be seen touching the little one, who is resting while wearing a blue onesie with trucks printed on it. Kayla Grant, People.com, 14 July 2025 The proud mother of three also added a photo of the sleeping newborn in a white onesie with a blue pacifier in his mouth. Kayla Grant, People.com, 3 July 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 10 Aug. 2025.

Last Updated: - Updated example sentences
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