coupon

A section of a ticket, showing the holder to be entitled to some specified accommodation or service, as to a passage over a designated line of travel, a particular seat in a theater, a discount, etc.

How to use

The term 'coupon' is commonly used in informal contexts, particularly in everyday conversations and commercial settings. A notable grammatical nuance is that 'coupon' often collocates with verbs like 'redeem' or 'clip,' and learners should be cautious not to confuse it with 'voucher,' which, although similar, typically implies a more specific type of discount or promotional offer.