/ Dictionary / Index Y yesterday: Meaning and Definition of Find definitions for: yes•ter•day Pronunciation: (yes'tur-dā", -dē), [key] — adv. on the day preceding this day. a short time ago: Yesterday your money went further. —n. the day preceding this day. time in the immediate past. —adj. belonging or pertaining to the day before or to a time in the immediate past: yesterday morning. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: yesterday (Thesaurus) yester yestereve Related Content Daily Word Quiz: intrepid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language