Definition of “heavyweight” - English Dictionary

(Definition of “heavyweight” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“heavyweight” in American English

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heavyweightnoun [ C ]

us /ˈhev·iˌweɪt/

heavyweight noun [ C ] (BOXING)

in boxing, a competitor who weighs more than 175 pounds, or 79.5 kilograms, and is in the heaviest group

heavyweight noun [ C ] (IMPORTANT PERSON)

someone who has a lot of power in a particular business or activity:

a political heavyweight

(Definition of “heavyweight” from the Cambridge Academic Content Dictionary © Cambridge University Press)

“heavyweight” in Business English

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heavyweightnoun [ C ]

uk /ˈheviweɪt/ us

a very successful and powerful person or company:

In order to promote London as a world financial centre, the Prime Minister will meet with City heavyweights later this week.
a political/industry/market heavyweight Market heavyweights will update investors in the first-quarter earnings season.
a heavyweight backer/broker
See also

(Definition of “heavyweight” from the Cambridge Business English Dictionary © Cambridge University Press)