heavy hitter heavy force fit • heavy hydrogen · · · Info · Definitions · Characters · · heavy hitter · · Text Common · · Latin · · Scripts 12 · · Length 4 · · Syllables Definitions · · · (noun) an influential person who works hard to promote the causes they are interested in. Synonyms: heavy hitter. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 r latin small letter r U+0072 t latin small letter t U+0074 v latin small letter v U+0076 y latin small letter y U+0079