Legal Definition
An extension of credit is a legal term referring to an agreement or provision that allows a debtor (the borrower) to acquire more credit, extend the original credit period, or increase the amount of credit available for payment under a debt obligation.
Plain-English Translation
Imagine you borrowed money, and now you have an extra chance to pay back some of it. An extension of credit means that if you were supposed to pay a loan by a certain date, the agreement allows you to delay that payment or increase the amount you need to pay before the deadline.