plural heavyweights
1
: a fighter in the heaviest class of boxers : a boxer who weighs more than 175 pounds (79.5 kilograms)
—often used before another noun
They are fighting for the heavyweight title.
the heavyweight champion of the world
2
: someone or something that is very important and powerful
Their company is one of the industry's heavyweights.
3
: something that is heavy
—often used before another noun
heavyweight paper
heavyweight cotton/wool/silk
Cite this Entry
“Heavyweight.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/heavyweight. Accessed 15 Apr. 2026.
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