Bank statement definition including break down of areas in the definition. Analyzing the definition of key term often provides more insight about concepts. Bank statement can be defined as: Bank report on the depositor’s beginning and ending cash balances, and a listing of its changes, for a period. Bank statement is from outside the company, form the bank. Because it is an external document tracking our cash transactions a bank statement can be used to check our bank balance by comparing our bank balance and transaction to the bank statement and creating a bank reconciliation