1 onesie | Definition of onesie

onesie

noun
one·​sie | \ ˈwÉ™n-zÄ“ 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

The batch of rodents onesies includes a mermaid, a unicorn, a shark, a superhero, a pineapple and more. Kelli Bender, PEOPLE.com, "PetSmart Just Revealed an Unbelievably Adorable Line of Guinea Pig Halloween Costumes," 21 Aug. 2019 Like all of Patil’s clothing items, this onesie is made out of bamboo knit that helps keep your child’s temperature regulated. Brittany Loggins, NBC News, "11 amazing items to make life easier — created by and for working moms," 14 Aug. 2019 The hospital has already given out 75 onesies and expects at least 150-175 babies to be born by August 3. Mallory Hughes, CNN, "A hospital is dressing up newborns in Baby Shark onesies for Shark Week," 30 July 2019 Every baby born at The Christ Hospital Health Network's Mt. Auburn and Liberty Township locations from July 28 to Aug. 3, will receive a limited-edition Baby Shark onesie. Sarah Brookbank, Cincinnati.com, "Christ Hospital, Newport Aquarium celebrating first-ever Baby Shark Week," 29 July 2019 The baby industry has recently been flooded with connected products, including connected onesies that double as sleep trackers and a robotic crib that's supposed to help rock a baby to sleep. Samantha Murphy Kelly, CNN, "Pampers is making a 'smart' diaper. Yes, really," 19 July 2019 When officers arrived, a man wearing the owner’s Christmas onesie emerged from the crawl space, the report said. Fox News, "Man broke into Oregon home with cat, arrested wearing homeowner’s Christmas onesie: police," 9 July 2019 The stranger was wearing Smith’s fiancée’s hooded onesie adorned with hearts and snowflakes. oregonlive.com, "Oregon man in onesie, cat named Spaghetti found hiding in crawl space during home burglary," 8 July 2019 In another shot, Markle and Prince Harry are pictured holding a tiny onesie with the Red Sox logo. Natasha Reda, Glamour, "Meghan Markle Made a Surprise Appearance at a Baseball Game in London With Prince Harry," 29 June 2019

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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