expirationn.

expiration (n.)early 15c., "vapor, breath," from Middle French expiration, from Latin expirationem/exspirationem (nominative expiratio/exspiratio) "a breathing out, exhalation," noun of action from past participle stem of expirare/exspirare "breathe out; breathe one\\'s last" (see expire). Meaning "termination, end, close" is from 1560s.