Breadcrumb Home > Dictionary > Index T tau: Meaning and Definition of Find definitions for: tau Pronunciation: (tou, tô for 1, 2, 4 täv, tôv for 3), [key] — n. the 19th letter of the Greek alphabet (T, &tgr;). the consonant sound represented by this letter. tav. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tau (Thesaurus) Tatung Tauber ✖ Related Content Daily Word Quiz: umbrage Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language