/ Dictionary / Index T tails: Meaning and Definition of Find definitions for: tails Pronunciation: (tālz), [key] — adj., adv. (of a coin) with the reverse facing up:Cf. On the next toss, the coin came up tails. —n. tail (def. 6). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tails (Thesaurus) tailrace tail skid Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language