waistcoat

1. (chiefly British) A sleeveless, collarless garment worn over a shirt and under a suit jacket.Examples: "Sunning himself on the board steps, I saw for the first time Mr. Farquhar Fenelon Cooke.[…]A silver snaffle on a heavy leather watch guard which connected the pockets of his corduroy waistcoat, together with a huge gold stirrup in his Ascot tie, sufficiently proclaimed his tastes."; "In the Victorian Era, exposing your shirtfront in public was considered improper, as shirts were viewed as undergarments. Waistcoats concealed this and helped [to] tame oversized, billowy shirts."Synonyms: vestBritish