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.
IBAN or International Bank Account Number is both an international system for bank accounts across international borders as well as the identification number assigned to such a bank account. The numbering system is defined in an international standard (ISO 13616:1997).