1. an amateur boxer who weighs no more than 126 pounds;
2. weighs 126-139 pounds;
3. a professional boxer who weighs between 123 and 126 pounds;
WordNet (r) 3.0 (2006):
featherweight
n 1: an amateur boxer who weighs no more than 126 pounds
2: weighs 126-139 pounds
3: a professional boxer who weighs between 123 and 126 pounds