vest
n. countablen. a piece of clothing without sleeves that you wear over a shirt or under a jacket. In some countries, it is also the word for a thin shirt you wear under your clothes to stay warm.
n. a sleeveless garment covering the upper body, typically worn over a shirt and under a suit jacket or as protective gear. In British English, refers specifically to an undergarment worn for warmth.
He wore a grey vest over his white shirt for the wedding.
The construction workers are required to wear bright yellow safety vests so drivers can see them clearly.
While the three-piece suit traditionally includes a matching vest, modern fashion often allows for contrasting textures or colors to create a more contemporary aesthetic.
From French veste (“a vest, jacket”), from Latin vestis (“a garment, gown, robe, vestment, clothing, vesture”), from Proto-Indo-European wéstis, from wes- (“to be dressed”) (English wear). Cognate with Sanskrit वस्त्र (vastra) and Spanish vestir.
In American English, it refers to a waistcoat; in British English, it usually refers to an undershirt.