/ Dictionary / Index E expiration: Meaning and Definition of Find definitions for: ex•pi•ra•tion Pronunciation: (ek"spu-rā'shun), [key] — n. a coming to an end; termination; close: the expiration of a contract. the act of expiring, or breathing out; emission of air from the lungs. death. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: expiration (Thesaurus) expiatory expiration date Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language