passbook passback • passbook savings account · · · Info · Definitions · Synonyms · Characters · · passbook · · Text Latin · · Script 8 · · Length 2 · · Syllables Definitions · · · (noun) a record of deposits and withdrawals and interest held by depositors at certain banks. Synonyms: bankbook. · · Noun Definition 1 Synonyms · · · bankbook · · Synonym 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 k latin small letter k U+006B o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073