onesie

American  

[wuhn-zee] / ˈwʌn zi /

noun

1. a one-piece leisure or sleeping garment for an adult, usually combining a long-sleeved top with long pants.

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Trademark.

1. Onesies, a brand name for one-piece garments for infants, the lower portion resembling briefs and having snaps across the crotch for convenience in diapering. Although a trademarked term, it is often spelled as lowercase onesie, referring to a single garment.

onesie British  

/ ˈwʌnzɪ /

noun

1. a one-piece garment combining a top with trousers, worn by adults as leisurewear

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Usage

What else does onesie mean? A onesie is a one-piece item of loungewear or sleepwear. Traditionally, onesies are worn by babies, but they exploded into adult novelty fashion in the 2010s. How is onesie pronounced?[wuhn-zee]

Etymology

Origin of onesie

First recorded in 1980–85; originally a trademark

Example Sentences

Change is desperately needed; we organized the NYC Onesie Walk to kick off Pregnancy & Infant Loss Awareness Month, which is every October.

From Washington Post • Dec. 10, 2021

According to Grailed, the onesie isn’t even made by Supreme: The logo was “printed on an American Apparel Onesie in China Town.”

From Slate • Sep. 4, 2018

A fake video titled “Baby Poops in His Onesie, But Dog’s Response Leaves Millions of People in Hysterics” has seemingly resulted in a wave of people falling for the hoax.

From The Verge • Dec. 12, 2017

Onesie - Comfort is in short supply in the adversarial world of the Commons.

From BBC • Dec. 24, 2013

A representative visits a new mother and offers a free Disney Cuddly Bodysuit, a variation of the classic Onesie.

From New York Times • Feb. 7, 2011