credit line

1. A line of copy acknowledging the source or origin of a news dispatch, published article, or other work.
2. The maximum amount of credit to be extended to a customer. Also called line of credit.

Specified amount of money available to a borrower from a bank usually for one year. A credit line is a moral, not a contractual, commitment, and no commitment fee is charged. Compensating balances, though, are commonly required-10% of the line plus 10% of amounts borrowed under the line. There are confirmed lines of credit and guidance lines, the former being documented by a letter to the depositor, the latter being an internal limit observed by the bank. Credit lines contrast with revolving credits, which are contractual and involve a commitment fee.

The noun has one meaning:

Meaning #1: the maximum credit that a customer is allowed
  Synonyms: credit line, line of credit, line, personal credit line, personal line of credit