To breathe out; expel from the mouth or nostrils in the process of respiration; emit from the lungs: opposed to inspire.To give out or forth insensibly or gently, as a fluid or volatile matter; exhale; yield.To exhaust; wear out; bring to an end.To emit the breath: opposed to inspire. SpecificallyTo emit the last breath; die.To come to an end; close or conclude, as a given period; come to nothing; cease; terminate; fail or perish; end: as, the lease will expire on the first day of May; all his hopes of empire expired.To come out; fly out.Synonyms Perish, etc. See die.