/ Dictionary / Index T tie tack: Meaning and Definition of Find definitions for: tie' tack" Pronunciation: [key] a pin having an ornamental head, pinned through the ends of a necktie to hold it against a shirt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tier table tie-up Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language