/ Dictionary / Index T tie plug: Meaning and Definition of Find definitions for: tie' plug" Pronunciation: [key] — Railroads. Railroads. a wooden plug driven into the hole left in a tie when a spike has been withdrawn. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tie plate Tiepolo Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language