/ Dictionary / Index T time stamp: Meaning and Definition of Find definitions for: time' stamp" Pronunciation: [key] a device for stamping the date and time of day that letters, packages, etc., are received or mailed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Times Square time study Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language