/ Dictionary / Index T tail coat: Meaning and Definition of Find definitions for: tail' coat". Pronunciation: [key] a man's fitted coat, cut away over the hips and descending in a pair of tapering skirts behind, usually black and worn as part of full evening dress. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tailcoat (Thesaurus) tailbone tail cone Related Content Daily Word Quiz: dentifrice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language