/ Dictionary / Index I insuperable: Meaning and Definition of Find definitions for: in•su•per•a•ble Pronunciation: (in-s'pur-u-bul), [key] — adj. incapable of being passed over, overcome, or surmounted: an insuperable barrier. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: insuperable (Thesaurus) insulting insupportable Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language