noun, noun which may take the genitive case particle 'no'
heavyweight; heavyweight division
Primarily used in boxing and other combat sports to refer to the heaviest weight class. Can also be used attributively with の.
He is the heavyweight champion.
ヘビー級の試合は迫力がある。
Heavyweight matches are powerful.
light heavyweight
junior heavyweight
super heavyweight
Wasei-eigo: from English 'heavy' plus 級 (class).