/ Dictionary / Index T time reversal: Meaning and Definition of Find definitions for: time' rever"sal Pronunciation: [key] — Physics. Physics. the mathematical operation of reversing the direction of time. Symbol: T Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. time-release times Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language