1. (v. t.) To breathe out; to emit from the lungs; to throw out from the mouth or nostrils in the process of respiration; -- opposed to inspire.

2. (v. t.) 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.

3. (v. t.) To emit; to give out.

4. (v. t.) To bring to a close; to terminate.

5. (v. i.) To emit the breath.

6. (v. i.) To emit the last breath; to breathe out the life; to die; as, to expire calmly; to expire in agony.

7. (v. i.) 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.

8. (v. i.) To burst forth; to fly out with a blast.