Undershirt vs. Onesie

Undershirtnoun

An undergarment worn beneath a shirt, often collarless and sleeveless.

Undershirtnoun

A shirt worn next the skin, under another shirt; - called also undervest.

Undershirtnoun

a collarless men's undergarment for the upper part of the body

Undershirt

An undershirt in American English (vest in British and Indian English, or singlet in Australia and New Zealand), is an article of underwear worn underneath a dress shirt (or sometimes T-shirt) intended to protect it from body sweat and odors. It can have short sleeves (T-shirt) or be sleeveless (A-shirt).

Onesienoun

(US) A one-piece garment for an infant or small child, generally worn over a diaper.

Onesienoun

One-piece adult loungewear jumpsuit.

Onesienoun

One-piece fashionable streetwear worn mostly by teenagers.

Onesienoun

a loose-fitting one-piece leisure garment covering the torso and legs

Onesienoun

a one-piece close-fitting lightweight garment worn by a young child, usually having sleeves but leaving the legs uncovered and fastening with press studs at the crotch.