1. a pair of loose trousers tied by a drawstring around the waist; worn by men and women in some Asian countries • Syn: pyjama • Hypernyms: trouser, pant 2.(usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers • Syn: pyjama, pj's, jammies • Hypernyms: nightwear, sleepwear, nightclothes • Hyponyms: sleeper