Ĕx/pi-rā'tion, n.
n. [Lat. expiratio, exspiratio, Fr. expiration, Pr. espiracio, Sp. expiracion, It. espirazione. See EXPIRE.]
Sense 1. The act of expiring; as, (a.) A breathing out or expulsion of air from the lungs through the mouth or nose, in the process of respiration; as, a forcible expiration. “It [air] is sent forth by way of expiration.” Holland. (b.) Emission of volatile matter; exhalation.
The true cause of cold is an expiration from the globe of the earth. Bacon.
(c.) Last emission of breath; death; extinction. “The groan of expiration.” Rambler. (d.) A coming to a close; cessation; termination; end.
Thou art come Before the expiration of this time. Shak.
Sense 2. That which is expired; matter breathed or exhaled forth; that which is produced by breathing out, as a sound; exhalation.
The aspirate “he,” which is none other than a gentle expiration. Sharp.