/ Dictionary / Index B book of account: Meaning and Definition of Find definitions for: book' of account' Pronunciation: [key] any journal, ledger, and supporting vouchers included in a system of accounts. the original records and books used in recording business transactions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. bookmobile Book of Books 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