1(British English) (North American Englishundershirt)a piece of underwear worn under a shirt, etc. next to the skina cotton vest compare singlet2a special piece of clothing that covers the upper part of the bodya bullet-proof vesta running vest3(North American English) (British Englishwaistcoat)a short piece of clothing with buttons down the front but no sleeves, usually worn over a shirt and under a jacket, often forming part of a man's suit
vest
vest