say it: HEV-ee-wayt
heavyweight is a noun meaning "an amateur boxer who weighs no more than 201 pounds". It carries 5 recorded senses.
an amateur boxer who weighs no more than 201 pounds
a wrestler who weighs more than 214 pounds
a professional boxer who weighs more than 190 pounds
a very large person; impressive in size or qualities
a person of exceptional importance and reputation
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for heavyweight come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.