expiration
ex·pi·ra·tion
noun \ˌek-spə-ˈrā-shən\Definition of EXPIRATION
1
a (1) : the act or process of releasing air from the lungs through the nose or mouth : exhalation (2) : the escape of carbon dioxide from the body protoplasm (as through the blood and lungs or by diffusion) b archaic : the last emission of breath : death
2
: something produced by breathing out
Learn More About
Seen & Heard 
What made you want to look up expiration? Please tell us where you read or heard it (including the quote, if possible).
