The act of expiring; as:
(a)
(Physiol.) 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.
(b)
Emission of volatile matter; exhalation. "The true cause of cold is an expiration from the globe of the earth."
(c)
The last emission of breath; death. "The groan of expiration."
(d)
A coming to a close; cessation; extinction; termination; end. "Before the expiration of thy time."