octogenarian octogamy • octogenarianism · · · Info · Definitions · Characters · · octogenarian · · Text Latin · · Script 12 · · Length Definitions · · · (noun) someone whose age is in the eighties. · · Noun Definition 1 (adj) being from 80 to 89 years old. · · Adjective Definition 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 g latin small letter g U+0067 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 t latin small letter t U+0074