Definition of definition for English Language Learners. : an explanation of the meaning of a word, phrase, etc. : a statement that defines a word, phrase, etc. : a statement that describes what something is.
An IBAN (International Bank Account Number) is an international bank account identifier used to uniquely identify the account of a customer at a financial institution. This is the only permissible account identifier for SEPA payments.
The IBAN consists of a country code and two check digits, followed by up to thirty additional alphanumeric characters which identify the particular bank, plus the individual account which is making or receiving the payment. These latter characters are known as the BBAN (Basic Bank Account Number).