The maximum amount of credit that a bank or other lender will extend to a customer, or the maximum that a credit card company will

An arrangement between a financial institution, usually a bank, and a customer that establishes a maximum loan balance that the bank will permit the borrower

A form or letter sent by a seller to a buyer, stating that a certain amount has been credited to the buyer’s account. (source: http://www.businessdictionary.com/definition/credit-note.html#ixzz2RP9KcXAG)

The unused portion of an open line of credit, such as a credit card or a revolving loan (such as a home-equity line of credit).