/ Dictionary / Index I ineffable: Meaning and Definition of Find definitions for: in•ef•fa•ble Pronunciation: (in-ef'u-bul), [key] — adj. incapable of being expressed or described in words; inexpressible: ineffable joy. not to be spoken because of its sacredness; unutterable: the ineffable name of the deity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ineffable (Thesaurus) ineducation ineffaceable Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language