Wiktionary
welter-weight
a. (context boxing English) between lightweight and middleweight n. 1 (context boxing English) a boxer weighing more than a lightweight boxer and less than a middleweight boxer; someone boxing in the '''welterweight''' class 2 (cx horse racing English) A weight of 28 pounds (or 40 pounds: a ''heavy welterweight''), sometimes imposed in addition to weight for age, chiefly in steeplechases and hurdle races.