Source : Webster's Revised Unabridged Dictionary (1913)

Abhorrent \Ab*hor"rent\, a. [L. abhorens, -rentis, p. pr. of
   abhorrere.]
   1. Abhorring; detesting; having or showing abhorrence;
      loathing; hence, strongly opposed to; as, abhorrent
      thoughts.

            The persons most abhorrent from blood and treason.
                                                  --Burke.

            The arts of pleasure in despotic courts I spurn
            abhorrent.                            --Clover.

   2. Contrary or repugnant; discordant; inconsistent; --
      followed by to. ``Injudicious profanation, so abhorrent to
      our stricter principles.'' --Gibbon.

   3. Detestable. ``Pride, abhorrent as it is.'' --I. Taylor.

Source : WordNet®

abhorrent
     adj : offensive to the mind; "an abhorrent deed"; "the obscene
           massacre at Wounded Knee"; "morally repugnant customs";
           "repulsive behavior"; "the most repulsive character in
           recent novels" [syn: {detestable}, {obscene}, {repugnant},
            {repulsive}]