heroin heroify • Heroin · · · Info · Definitions · Synonyms · Characters · · heroin · · Text Latin · · Script 6 · · Length 2 · · Syllables Definitions · · · (noun) a narcotic that is considered a hard drug; a highly addictive morphine derivative; intravenous injection provides the fastest and most intense rush. Synonyms: diacetylmorphine. · · Noun Definition 1 Synonyms · · · diacetylmorphine · · Synonym 1 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072