- a breathing out, as of air from the lungs
- something breathed out
- a sound, etc. made by breathing out
- a breathing one's last; dying
- a coming to an end; close
- a formal termination on a closing date, as of a contract or subscription
Origin of expirationMiddle English expiracioun from Classical Latin expiratio, exspiratio from past participle of exspirare, expire
- The act of coming to a close; termination: the expiration of a contract.
- The act of breathing out; exhalation.
- Archaic Death.
- The act of expiring.
- The act or process of breathing out, or forcing air from the lungs through the nose or mouth; as, respiration consists of inspiration and expiration; – opposed to inspiration.
- Emission of volatile matter; exhalation.
- The last emission of breath; death.
- A coming to a close; cessation; extinction; termination; end.
- That which is expired; matter breathed forth; that which is produced by breathing out, as a sound.
From Middle French expiration, from Latin exspīrātiōnem, accusative singular of exspīrātiō.