n. [ L. expiratio, exspiratio: cf. F. expiration. See Expire. ] 1. 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. [ 1913 Webster ] The true cause of cold is an expiration from the globe of the earth. Bacon. (c) The last emission of breath; death. “The groan of expiration.” Rambler. (d) A coming to a close; cessation; extinction; termination; end. [ 1913 Webster ] Before the expiration of thy time. Shak. [ 1913 Webster ] 2. That which is expired; matter breathed forth; that which is produced by breathing out, as a sound. [ 1913 Webster ] The aspirate “he, ” which is . . . a gentle expiration. G. Sharp. [ 1913 Webster ] | 
