1. to die
    The patient expired in hospital.
  2. to become invalid
    My library card will expire next week.
  3. to exhale; to breathe (out).
  4. to exhale (something).
  5. To give forth insensibly or gently, as a fluid or vapour; to emit in minute particles.
  6. To bring to a close; to terminate.

The above text is a snippet from Wiktionary: expire
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