/ Dictionary / Index D double magnum: Meaning and Definition of Find definitions for: dou'ble mag'num Pronunciation: [key] Jeroboam (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. double-lock double-minded Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language