bank rate
noun [ C ] uk/ˈbæŋk ˌreɪt/ us/ˈbæŋk ˌreɪt/
（中央银行规定的）银行贴现率;银行利率;（尤指）最低贷率
the rate of interest set by a central bank in a country that is the lowest rate at which it lends money to other banks. This rate affects the interest rates that are then charged to customers by the banks.
（银行借款收取的）利率
the amount of interest that a bank charges when it lends money