COUPON

[noun] [C] - a piece of paper which can be used to obtain something without paying for it or at a reduced priceIf you save up ten coupons from the cornflakes packet you can get a free teddy bear.A coupon is also a piece of paper, esp. a part of an advertisement in a newspaper or magazine, which a reader can send to an organization in order to obtain information about its products or services.To find out more about our new computers, fill in the coupon and send it to us at the address given below.