Definition of expiration date noun from the Oxford Advanced American Dictionary

     

    expiration date

     noun
    noun
     
     
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  1. 1the date after which an official document, agreement, etc. is no longer valid, or after which something cannot legally be used Check the expiration date on your passport.
  2. 2 the date by which an item of food should be eaten The expiration date on this yogurt was November 20.
See the Oxford Advanced Learner's Dictionary entry: expiration date