expire

v. (-ring) 1 (of a period of time, validity, etc.) Come to an end. 2 cease to be valid. 3 die. 4 (also absol.) Breathe out (air etc.).  expiration n. Expiratory adj. (in sense 4). [latin spirare breathe]

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.