Meaning of welterweight

Definition of welterweight

(noun) a weight of 28 pounds; sometimes imposed as a handicap in a horse race (such as a steeplechase)
an amateur boxer who weighs no more than 148 pounds
a wrestler who weighs 154-172 pounds
a professional boxer who weighs between 141 and 147 pounds

Other information on welterweight

WIKIPEDIA results for welterweight
Amazon results for welterweight