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

The dictionary is based on the WordNet Electronic Lexical Database.
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