Pronunciation: (wel'tur-wāt"), [key]
1. a boxer or other contestant intermediate in weight between a lightweight and a middleweight, esp. a professional boxer weighing up to 147 pounds (67 kg).
2. (in a steeplechase or hurdle race) a weight of 28 pounds (13 kg) that is assigned to a horse in addition to the poundage assigned based on the age of the horse.
3. a rider of steeplechase or hurdle-race horses who, though acting as a jockey, is of comparatively average weight and not small or lightweight as a professional jockey; heavyweight rider.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.