/ Dictionary / Index C come-outer: Meaning and Definition of Find definitions for: come-out•er Pronunciation: (kum"ou'tur), [key] — n. Informal. an outspoken or very active supporter of a cause, esp. a reformer or a social activist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. come-on comer Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language