a bank or other financial institution that supplies sb with a credit card and is responsible for their account （信用卡的）发卡银行
a bank that supplies sth such as a cheque or a letter of credit (= a letter from a bank promising to pay sb on behalf of a customer) （信用证的）开证银行◆It takes about five days for the issuing bank to pay off the letter of credit. 开证行偿付信用证大约需要五天时间。➡advising bank