/ Dictionary / Index T tactus: Meaning and Definition of Find definitions for: tac•tus Pronunciation: (täk'toos), [key] — n. the basic metrical unit in medieval music. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tactual Tacubaya Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language