1. A small book issued by a bank to a customer that records deposits, withdrawals, and the account balance.
Usage: Also called a passbook.; Largely replaced by electronic statements and online banking in modern practice.

Examples

• She kept her bankbook in a safe place to track her savings.
• The customer brought his bankbook to the bank to verify his balance.
• Before online banking, people relied on their bankbooks to monitor transactions.
• The bankbook showed a steady increase in deposits over the year.
• My grandmother still prefers using her bankbook instead of checking her account online.