Source : Webster's Revised Unabridged Dictionary (1913)

Chateau \Cha`teau"\, n.; pl. {Chateux}. [F. ch[^a]teau a castle.
   See {Castle}.]
   1. A castle or a fortress in France.

   2. A manor house or residence of the lord of the manor; a
      gentleman's country seat; also, particularly, a royal
      residence; as, the chateau of the Louvre; the chateau of
      the Luxembourg.

   Note: The distinctive, French term for a fortified caste of
         the middle ages is ch[^a]teau-fort.

   {Chateau en Espagne}[F.], a castle in Spain, that is, a
      castle in the air, Spain being the region of romance.