Source : Webster's Revised Unabridged Dictionary (1913)

Vatican \Vat"i*can\, n. [L. Vaticanus, mons, or collis,
   Vaticanus, the Vatican hill, in Rome, on the western bank of
   the Tiber: cf. F. Vatican, It. Vaticano.]
   A magnificent assemblage of buildings at Rome, near the
   church of St. Peter, including the pope's palace, a museum, a
   library, a famous chapel, etc.

   Note: The word is often used to indicate the papal authority.

   {Thunders of the Vatican}, the anathemas, or denunciations,
      of the pope.

Source : WordNet®

Vatican
     n : the residence of the Catholic Pope in the Vatican City [syn:
          {Vatican Palace}]