From Longman Dictionary of Contemporary Englishthree-piece suitˌthree-piece ˈsuit noun [countable] DCCa suit that consists of a jacket, waistcoat, and trousers made from the same material
Examples from the Corpus
three-piece suit• Suddenly like Matisse in a three-piece suit and consultant's white coat, I take infinite pains to keep this model alive.• The Prime Minister carried a fly whisk and a cane and wore a three-piece suit.• Her immigrant father with his thick mustache and accent and three-piece suit would only bring her more ridicule.• At this point, a large man in a brown three-piece suit ahead of me looked up from a sheaf of notes.• In spite of the heat he was very smartly dressed in a dark three-piece suit.• Hank would arrive each morning, dressed in his neat three-piece suit, white shirt, and solid-color tie.• He wore an immaculately tailored three-piece suit, cut from a cloth of apricot cream. 