expiration

Short definition from Wiktionary

Noun

1. 1
   An act, process, or instance of expiring: The act or process of breathing out, or forcing air from the lungs through the nose or mouth.
2. 2
   An act, process, or instance of expiring: A single outward breath.
3. 3
   An act, process, or instance of expiring: Other similar release of volatile matter.
4. 4
   An act, process, or instance of expiring: The last emission of breath; thus, synonym of death.
5. 5
   An act, process, or instance of expiring: Any other (metaphorically comparable) cessation, extinction, or ending.
6. 6
   An act, process, or instance of expiring: That which is produced by breathing out, as a sound.