/ Dictionary / Index D daypack: Meaning and Definition of Find definitions for: day•pack Pronunciation: (dā'pak"), [key] — n. a relatively small backpack, with shoulder straps, used for day hikes, carrying books, or the like. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. day one day room Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language