expiration

(noun) a coming to an end of a contract period. Synonyms: termination, expiry. Example: "The expiry of his driver's license."

(noun) euphemistic expressions for death. Synonyms: passing, loss, departure, exit, going, release. Example: "Thousands mourned his passing."

(noun) the act of expelling air from the lungs. Synonyms: exhalation, breathing out.