Definition of "expire" in English

verb

1. (intransitive) To die.

   • The patient expired in hospital.

2. (intransitive) To lapse and become invalid.

   • My library card will expire next week.

3. (intransitive) To come to an end; to conclude.

4. (ambitransitive) To exhale; to breathe out.

5. (transitive) To give forth insensibly or gently, as a fluid or vapour; to emit in minute particles.

6. (transitive) To bring to a close; to terminate.

7. (transitive, computing) To cause to lapse; to invalidate.

   • The site expires cached pages that are older than 24 hours.