/ Dictionary / Index A account book: Meaning and Definition of Find definitions for: account' book" Pronunciation: [key] a book in which personal or commercial accounts are recorded; ledger. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. accountant account current Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language