a. That may expire; capable of being brought to an end. [ 1913 Webster ]

n. One who expires or is expiring. [ 1913 Webster ]

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 ]

adj. bearing a date after which it is no longer valid or salable; -- of a security, option, or perishable item. [ British ]
Syn. -- expiring, dated. [ PJC ]

a. (Physiol.) Pertaining to, or employed in, the expiration or emission of air from the lungs; as, the expiratory muscles. [ 1913 Webster ]

v. t. [ imp. & p. p. Expired p. pr & vb. n. Expiring. ] [ L. expirare, exspirare, expiratum, exspiratum; ex out + spirare to breathe: cf. F. expirer. See Spirit. ] 1. To breathe out; to emit from the lungs; to throw out from the mouth or nostrils in the process of respiration; -- opposed to inspire. [ 1913 Webster ]

Anatomy exhibits the lungs in a continual motion of inspiring and expiring air. Harvey. [ 1913 Webster ]

This chafed the boar; his nostrils flames expire. Dryden. [ 1913 Webster ]

2. To give forth insensibly or gently, as a fluid or vapor; to emit in minute particles; to exhale; as, the earth expires a damp vapor; plants expire odors. [ 1913 Webster ]

The expiring of cold out of the inward parts of the earth in winter. Bacon. [ 1913 Webster ]

3. To emit; to give out. [ Obs. ] Dryden. [ 1913 Webster ]

4. To bring to a close; to terminate. [ Obs. ] [ 1913 Webster ]

Expire the term
Of a despised life. Shak. [ 1913 Webster ]

v. i. 1. To emit the breath. [ 1913 Webster ]

2. To emit the last breath; to breathe out the life; to die; as, to expire calmly; to expire in agony. [ 1913 Webster ]

3. To come to an end; to cease; to terminate; to perish; to become extinct; as, the flame expired; his lease expires to-day; the month expired on Saturday. [ 1913 Webster ]

4. To burst forth; to fly out with a blast. [ Obs. ] “The ponderous ball expires.” Dryden. [ 1913 Webster ]

adj. having come to an end or become void after passage of a period of time; as, an expired passport; caught driving with an expired license. Opposite of unexpired. [ WordNet 1.5 ]

a. 1. Breathing out air from the lungs; emitting fluid or volatile matter; exhaling; breathing the last breath; dying; ending; terminating. [ 1913 Webster ]

2. Pertaining to, or uttered at, the time of dying; as, expiring words; expiring groans. [ 1913 Webster ]

n. Expiration. [ 1913 Webster ]

He had to leave at the expiry of the term. Lamb. [ 1913 Webster ]

The Parliament . . . now approaching the expiry of its legal term. J. Morley. [ 1913 Webster ]