Real Dictionary

expiration date
countable noun: The expiration date on a food container is the date by which the food should be sold or eaten before it starts to decay.

expiration date in American English
noun: the last date that a product, as food, should be used before it is considered spoiled or ineffective, usually specified on the label or package

expiration date in British English
noun

expiration date in Hospitality
noun: The expiration dateof a credit card is the date, written on the card, when it stops being valid.

expiration date in Insurance
noun: The expiration date of an insurance policy is the date beyond which it is no longer valid and must be renewed.