1, A piece of paper that allows one to get special consideration when purchasing an item: Sandra was an avid clipper of coupons from the newspaper which she took to the grocery store when she went shopping, coming home with good bargains.
2. A form, which, when completed and mailed to a company sponsoring a raffle or a competition, entitles the sender the opportunity to win a prize or to receive information: Jane often sent coupons to firms hoping to acquire useful gifts, such as a toaster or coffee maker!