/ Dictionary / Index P passbook: Meaning and Definition of Find definitions for: pass•book Pronunciation: (pas'book", päs'-), [key] — n. a bankbook. (formerly) a small book or ledger for each customer in which a merchant keeps a record of goods sold on credit and the amounts owed and paid. See(def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: passbook (Thesaurus) passband passbook savings account Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language