adj. & n.
--adj.
1. (of a person, animal, garment, etc.) of below average weight.
2 of little importance or influence.
--n.
1. a lightweight person, animal, or thing.
2 a a weight in certain sports intermediate between featherweight and welterweight, in the amateur boxing scale 57-60 kg but differing for professionals, wrestlers, and weightlifters. b a sportsman of this weight.
Phrases and idioms:
junior lightweight
1. a weight in professional boxing of 57.1-59 kg.
2 a professional boxer of this weight.