/ Dictionary / Index H horrendous: Meaning and Definition of Find definitions for: hor•ren•dous Pronunciation: (hô-ren'dus, ho-), [key] — adj. shockingly dreadful; horrible: a horrendous crime. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: horrendous (Thesaurus) Horowitz horrent Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language