/ Dictionary / Index E external ear: Meaning and Definition of Find definitions for: exter'nal ear' Pronunciation: [key] the outer portion of the ear, consisting of the auricle and the canal extending to the tympanic membrane. See diag. under. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. external degree external galaxy Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language