OXFORD DICTIONARY
welterweight, n.
1 a weight in certain sports intermediate between lightweight and middleweight, in the amateur boxing scale 63.5-67 kg but differing for professionals, wrestlers, and weightlifters.
2 a sportsman of this weight.
junior welterweight
1 a weight in professional boxing of 61.2-63.5 kg.
2 a professional boxer of this weight.
light welterweight
1 a weight in amateur boxing of 60-63.5 kg.
2 an amateur boxer of this weight.
THESAURUS
welterweight
Chinese boxer, bantamweight, black belt, boxer, brown belt, bruiser, catchweight, featherweight, fighter, fisticuffer, flyweight, heavyweight, karate expert, light heavyweight, lightweight, middleweight, palooka, prizefighter, pug, pugilist, savate expert, sparrer