one·​sie | \ ˈwən-zē How to pronounce onesie (audio) \
plural onesies

Definition of onesie

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 During our Zoom interview, Jones wore a black onesie and a red bonnet that matched her nails. al, 1 Oct. 2021 During our Zoom interview, Jones wore a black onesie and a red bonnet that matched her nails. Arit John, Los Angeles Times, 1 Oct. 2021 In the adorable shots, Aydin holds baby Ender, who is wearing a multicolored onesie and a blue beanie. Georgia Slater,, 29 Sep. 2021 His robot baby was decked out in a onesie printed with a pattern from Homer's selection of silk scarves. Quinci Legardye, Harper's BAZAAR, 14 Sep. 2021 Then in April 2021, the couple held up a onesie at a baby shower. Kimberly C. Moore, USA TODAY, 7 Sep. 2021 Riley's onesie features the OSS logo, the spy organization featured in the film. Georgia Slater,, 19 July 2021 Sashay in a skin-tight onesie and colorful coffin nails. Yaa Bofah, Good Housekeeping, 26 July 2021 Campbell shared the snap via Instagram Stories on July 15, posting a picture of the baby girl, with her face out of frame, lying on her back in a onesie covered in multicolored Versace logos. Elizabeth Loga, Glamour, 16 July 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'onesie.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of onesie

1983, in the meaning defined at sense 1

History and Etymology for onesie

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

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Last Updated

14 Oct 2021

Cite this Entry

“Onesie.” Dictionary, Merriam-Webster, Accessed 2 Dec. 2021.

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