Coupon

n.	1.	(Com.) A certificate of interest due, printed at the bottom of transferable bonds (state, railroad, etc.), given for a term of years, designed to be cut off and presented for payment when the interest is due; an interest warrant.
	2.	A section of a ticket, showing the holder to be entitled to some specified accomodation or service, as to a passage over a designated line of travel, a particular seat in a theater, or the like.
	3.	a ticket or form allowing the bearer to purchase a specific quantity of rationed goods; - such coupons are typically issued by a governmental agency.
	4.	a printed form, often distributed as part of an advertisement, entitling the bearer to purchase a specific item of merchandise at a discount; or, a similar form which may be submitted to the issuer to obtain goods or information. Such coupons may be issued by the manufacturer (manufacturer's coupon) or by a retail establishment; in the latter case they may then be redeemed only at that particular retail store.

Noun	1.	coupon - a negotiable certificate that can be detached and redeemed as needed Synonyms: voucher
	2.	coupon - a test sample of some substance

book token, commercial document, commercial instrument, luncheon voucher, meal ticket, twofer, voucher