welter-weight

Short definition from Wiktionary

Adjective

1. 1
   between lightweight and middleweight

Noun

1. 1
   a boxer weighing more than a lightweight boxer and less than a middleweight boxer; someone boxing in the welterweight class
2. 2
   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.