Collins COBUILD Advanced Learner's English Dictionary - trousers

Note: The form 'trouser' is used as a modifier. 1. Trousers are a piece of clothing that you wear over your body from the waist downwards, and that cover each leg separately. (mainly BRIT; in AM, usually use pants) He was smartly dressed in a shirt, dark trousers and boots... Alexander rolled up his trouser legs. N-PLURAL: also a pair of N 2. to wear the trousers: see wear