/ Dictionary / Index D double-book: Meaning and Definition of Find definitions for: dou•ble-book Pronunciation: (dub'ul book'), [key] — v.t. to overbook by accepting more than one reservation for the same hotel room, airplane seat, etc. to make reservations for (more than one hotel accommodation, seat on a plane, etc.) so as to be certain of obtaining at least one of them. —v.i. to make double reservations for passenger space, a hotel room, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. double bond double-bottom Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language