/ Dictionary / Index T TDRS: Meaning and Definition of Find definitions for: TDRS Pronunciation: [key] Tracking and Data Relay Satellite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. TDN t.d.s. Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language