/ Dictionary / Index B book of hours: Meaning and Definition of Find definitions for: book' of hours' Pronunciation: [key] a book containing the prescribed order of prayers, readings from Scripture, and rites for the canonical hours. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Book of Common Prayer* Book of Kells* Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language