- (n.) Emission of volatile matter; exhalation.
- (n.) 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.
- (n.) The act of expiring.
- (n.) That which is expired; matter breathed forth; that which is produced by breathing out, as a sound.
- (n.) The last emission of breath; death.
- (n.) A coming to a close; cessation; extinction; termination; end.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). expiration. Retrieved September 22, 2026, from http://smartdefine.org/expiration/definitions/2006120 |
| Chicago | Webster's. 2011. "expiration" http://smartdefine.org/expiration/definitions/2006120 (accessed September 22, 2026). |
| Harvard | Webster's 2011, expiration, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/expiration/definitions/2006120>. |
| MLA | Webster's. "expiration" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/expiration/definitions/2006120> |