welter-weight noun 2adjective 1forms 1 noun2 •a boxer weighing more than a lightweight boxer and less than a middleweight boxer; someone boxing in the welterweight class •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. adjective1 •between lightweight and middleweight formswelter-weights