/ Dictionary / Index U unknowable: Meaning and Definition of Find definitions for: un•know•a•ble Pronunciation: (un-nō'u-bul), [key] — adj. not knowable; incapable of being known or understood. —n. something that is unknowable. the postulated reality lying behind all phenomena but not cognizable by any of the processes by which the mind cognizes phenomenal objects. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: unknowable (Thesaurus) unknot unknowing 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