/ Dictionary / Index S sexagenarian: Meaning and Definition of Find definitions for: sex•a•ge•nar•i•an Pronunciation: (sek"su-ju-nâr'ē-un), [key] — adj. of the age of 60 years or between 60 and 70 years old. —n. a sexagenarian person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sexagenarian (Thesaurus) sex act sexagenary Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language