trouser n 1: (usually in the plural) a garment extending from the waist to the knee or ankle, covering each leg separately; "he had a sharp crease in his trousers" [syn: {trouser}, {pant}] 2: a garment (or part of a garment) designed for or relating to trousers; "in his trouser's pocket"; "he ripped his left trouser on the fence"