authorization code UK US noun [C]
► BANKING, COMMERCE a set of numbers, or letters and numbers, usually sent as an electronic message from a bank, which shows that a customer's payment by credit card was officially approved: »
If an approval is given with an authorization code, be sure to record this information on the sales slip.
► IT a set of numbers and letters that you must type into a computer system to prove that you have official permission to use software or equipment, change a website, etc.: »
An authorization code is required when transferring domains from one registrar to another.
Financial and business terms. 2012.