Source : Webster's Revised Unabridged Dictionary (1913)

Elector \E*lect"or\, a. [Cf. F. ['e]lectoral.]
   Pertaining to an election or to electors.

         In favor of the electoral and other princes. --Burke.

   {Electoral college}, the body of princes formerly entitled to
      elect the Emperor of Germany; also, a name sometimes
      given, in the United States, to the body of electors
      chosen by the people to elect the President and Vice
      President.

Source : WordNet®

electoral college
     n : the body of electors who formally elect the United States
         president and vice-president