From Longman Dictionary of Contemporary Englishmiddleweightmid‧dle‧weight /ˈmɪdlweɪt/ noun [countable] DSOa boxer who weighs less than 72.58 kilograms, and who is heavier than a welterweight but lighter than a light heavyweight
Examples from the Corpus
middleweight• A Brighton-based boxer, Eubank is a middleweight world title contender the boxing critics love to beat up in print.• Len Harvey, the leading middleweight in the inter-war years, fought 412 contests.• This victory may set Stretch up with a world-title elimination fight with Britain's other leading light middleweight, Chris Pyatt.• He won the light middleweight title at the 1995 Pan Am Games.• During his career, Olajide rose to be the No. 1 world middleweight contender.• World middleweight champions Mickey Walker and Joey Giardello both came from solid middle-class homes, but fought like cavemen in the ring. 