Source : Webster's Revised Unabridged Dictionary (1913)

Horrible \Hor"ri*ble\, a. [OE. horrible, orrible, OF. horrible,
   orrible, F. horrible, fr. L. horribilis, fr. horrere. See
   {Horror}.]
   Exciting, or tending to excite, horror or fear; dreadful;
   terrible; shocking; hideous; as, a horrible sight; a horrible
   story; a horrible murder.

         A dungeon horrible on all sides round.   --Milton.

   Syn: Dreadful; frightful; fearful; terrible; awful; terrific;
        shocking; hideous; horrid.

Source : WordNet®

horrible
     adj : provoking horror; "an atrocious automobile accident"; "a
           frightful crime of decapitation"; "an alarming, even
           horrifying, picture"; "war is beyond all words
           horrible"- Winston Churchill; "an ugly wound" [syn: {atrocious},
            {frightful}, {horrifying}, {ugly}]