/ Dictionary / Index D Doubleday: Meaning and Definition of Find definitions for: Dou•ble•day Pronunciation: (dub'ul-dā"), [key] 1819–93, U.S. army officer; sometimes credited with inventing the modern game of baseball. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. double date double-deal Related Content Daily Word Quiz: entomology Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language