From Longman Dictionary of Contemporary Englishflyweightfly‧weight /ˈflaɪweɪt/ noun [countable] DSOa boxer who weighs less than 50.80 kilograms, and who is heavier than a strawweight but lighter than a bantamweight
Examples from the Corpus
flyweight• For instance, judo flyweight Karen Briggs grappling on with a dislocated shoulder shoved back in its socket.• Boxing: Gold medals are awarded in light flyweight, bantamweight, lightweight, welterweight, middleweight and heavyweight.• The Gorbals produced flyweight boxers and hard drinkers in profusion in the 1930s, and Lynch died there 6 August 1946.• His championship-winning days began in 1983 and he lost the flyweight title two years ago, since when he has remained unbeaten.• He did not relish training, though the flyweight limit was eight stones.• Yuri Arbachakov, a talented but untested flyweight.• In Jimmy Wilde, the world flyweight champion from 1916, Britain produced one of the very greatest boxers of all time. 