From Longman Dictionary of Contemporary Englishwelterweightwel‧ter‧weight /ˈweltəweɪt $ -ər-/ noun [countable] DSOa boxer who weighs less than 66.68 kilograms, and who is heavier than a lightweight but lighter than a middleweight
Examples from the Corpus
welterweight• He even boxed as a welterweight until his hands became too mangled to keep fighting.• In the co-feature, former world champion Pernell Whitaker won a unanimous decision over Andrei Pestriaev in a welterweight bout.• De La Hoya, 26, has won world titles in three divisions: lightweight, light-welter and welterweight.• But ex-light welterweight champ Terry is worried about his brother's children.• Boxing: Gold medals are awarded in light flyweight, bantamweight, lightweight, welterweight, middleweight and heavyweight.• The 25-year-old Dublin soldier had been virtually written off in the welterweight division.Origin welterweight (1800-1900) welter “heavy rider or boxer” ((19-20 centuries)) (probably from welt “to hit” ((19-20 centuries))) + weight 