Source : Webster's Revised Unabridged Dictionary (1913)

Anti-Semitism \An`ti-Sem"i*tism\, n.
   Opposition to, or hatred of, Semites, esp. Jews. --
   {An`ti-Sem"ite}, n. -- {An`ti-Sem*it"ic}, a.

Source : WordNet®

anti-Semitism
     n : the intense dislike for and prejudice against Jewish people