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.
Draped on the back of the sofa behind Kevin were multiple ultrasound photos, a pair of baby’s shoes and a custom onesie. Angel Saunders, People.com, 24 Jan. 2025 The photo featured a pink onesie, an ultrasound photo, a tiny pair of shoes and what appears to be the couple’s dog, Decoy. Rebecca Cohen, NBC News, 28 Dec. 2024 Hanna Andersson also has beautiful Menorah pajamas for women, Menorah long johns for men and a toddler onesie. Christopher Murray, Fox News, 21 Dec. 2024 Officers pulled over a Rolls-Royce Ghost speeding north on Highway 99 and were stunned to find a small monkey wearing a onesie inside — as well as copious amounts of marijuana and five cellphones. Clara Harter, Los Angeles Times, 4 Jan. 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

Dictionary Entries Near onesie

Cite this Entry

“Onesie.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/onesie. Accessed 6 Feb. 2025.

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