Entry 5 senses · 2 variants Webster, 1913 heavyweight · IPA /ˈhɛ.vi.weɪt/ adj. n. 01 adj. heaviest in a category; as, a heavyweight boxer. 1. heaviest in a category; as, a heavyweight boxer. 02 n. a wrestler who weighs more than 214 pounds. 1. a wrestler who weighs more than 214 pounds. 2. a boxer who weighs more than 195 pounds. 3. a very large person. 4. a person of exceptional importance and reputation. Syn. giant, hulk. — Syn. -- colossus, behemoth, giant, titan.