/ Dictionary / Index T TRA: Meaning and Definition of Find definitions for: TRA Pronunciation: [key] Thoroughbred Racing Association. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tr. trabeated Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language