1 One of several dated slips attached to a bond, which must be presented to the agents of the issuer or the company to obtain an interest payment or dividend. They are usually used with bearer bonds; the coupon yield is the yield provided by a bearer bond.
2 The rate of interest paid by a fixed-interest bond. The annual payment is a percentage of the bond's nominal value.
3 (coupon security) A bond or note on US Treasury Markets.
4 A fixed-rate payment on an interest or currency swap.