Longman Dictionary of Contemporary English homepage

expiry

noun
     
ex‧pir‧y [uncountable] British English
1 the end of a period of time during which an official document can legally be used, or the end of a period of authority [= expiration American English]
expiry of
the formal expiry of the presidential term in September
Only seven minutes remained before the expiry of the noon deadline.
2

expiry date

the date after which something is not safe to eat or can no longer be used [= expiration date American English]
Check the expiry date on your passport.
Eggs must be marked with an expiry date that is ten days from the date of packing.

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