/ Dictionary / Index U unconceivable: Meaning and Definition of Find definitions for: un•con•ceiv•a•ble Pronunciation: (un"kun-sē'vu-bul), [key] — adj. Archaic. inconceivable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. uncompromising unconcern Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language