/ Dictionary / Index S sellout: Meaning and Definition of Find definitions for: sell•out Pronunciation: (sel'out"), [key] — n. an act or instance of selling out. an entertainment, as a show or athletic event, for which all the seats are sold. a person who betrays a cause, organization, or the like; traitor. a person who compromises his or her personal values, integrity, talent, or the like, for money or personal advancement. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sellout (Thesaurus) sell-off Selma Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language