a piece of paper that can be used to get something without paying for it, or at a reduced price
If you collect ten coupons from the newspaper, you can get a free beach towel.
Shoppers can redeem this coupon for a 20% discount on their next purchase at the store.
The restaurant offered a special deal with a coupon for a free dessert with the purchase of an entrée.
Online retailers often provide digital coupons that customers can apply during the checkout process for discounts.
In the Sunday newspaper, there was a coupon for buy-one-get-one-free on a popular brand of laundry detergent.
