Wordnet 3.0
NOUN (4)
1.
a weight of 28 pounds;
sometimes imposed as a handicap in a horse race (such as a steeplechase);
2.
an amateur boxer who weighs no more than 148 pounds;
3.
a wrestler who weighs 154-172 pounds;
4.
a professional boxer who weighs between 141 and 147 pounds;
The Collaborative International Dictionary of English v.0.48:
Welterweight \Wel"ter*weight`\, n.
1. (Horse Racing) A weight of 28 pounds (one of 40 pounds is
called a heavy welterweight) sometimes imposed in
addition to weight for age, chiefly in steeplechases and
hurdle races.
[Webster 1913 Suppl.]
2. A boxer or wrestler whose weight is intermediate between
that of a lightweight and that of a middleweight.
[Webster 1913 Suppl.]
WordNet (r) 3.0 (2006):
welterweight
n 1: a weight of 28 pounds; sometimes imposed as a handicap in a
horse race (such as a steeplechase)
2: an amateur boxer who weighs no more than 148 pounds
3: a wrestler who weighs 154-172 pounds
4: a professional boxer who weighs between 141 and 147 pounds
Moby Thesaurus II by Grady Ward, 1.0:
22 Moby Thesaurus words for "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