letter of credit letter of credit noun [C] (abbr l.c., L/C) CONFIRMED LETTER OF CREDIT, IRREVOCABLE LETTER OF CREDIT (Finance ; Trade ) a letter that a bank prepares for a customer in which it agrees to pay sb an amount of money under particular circumstances, used especially as a way of paying for imported goods: The importer asks the bank to issue a letter of credit on his behalf. ⇨ DOCUMENTARY CREDIT |