/ Dictionary / Index E expiratory: Meaning and Definition of Find definitions for: ex•pir•a•to•ry Pronunciation: (ik-spīr'u-tôr"ē, -tōr"ē), [key] — adj. pertaining to the expiration of air from the lungs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: expiratory (Thesaurus) expiration date expire 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