/ Dictionary / Index T tossup: Meaning and Definition of Find definitions for: toss•up Pronunciation: (tôs'up", tos'-), [key] — n. the tossing of a coin to decide something by its fall. an even choice or chance: It's a tossup whether they'll come or not. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tossup (Thesaurus) tosspot tost Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language