/ Dictionary / Index T tactical unit: Meaning and Definition of Find definitions for: tac'tical u'nit Pronunciation: [key] — Mil. Mil. a group organized to function in combat as a self-contained unit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Tactical Air Command tactical wire 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