0 the rate of interest that a country's central bank charges for lending money to other banks:
1 a rate of interest that you use to calculate the present value of an amount of money that you receive or pay in the future:
2 the rate by which the price of a bill of exchange is reduced if it is bought before its payment date
3 a reduced priced that is offered to customers if they buy large quantities of products or services or if they pay a bill by an agreed date