the minimum rate of interest that banks in the US and some other countries must pay when they borrow money from other banks (美国及其他一些国家银行之间借款的)贴现率 the amount that the price of a bill of exchange is reduced by when it is bought before it reaches its full value (汇票)贴现率 an accounting term used to describe the relationship between the current value of an investment and its expected future value, given a particular rate of growth or interest (投资)折现率