/ Dictionary / Index T thousand days: Meaning and Definition of Find definitions for: thou'sand days' Pronunciation: [key] — (sometimes caps.) the presidential administration of John F. Kennedy, which lasted 1037 days (January 20, 1961, to November 22, 1963). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Thousand and One Nights, The* thousandfold Related Content Daily Word Quiz: confectionery Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language