1. CASTING-VOTE ,
2. CASTLE, noun
3. A house fortified for defense against an enemy; a fortress. The term seems to include the house and the walls or other works around it. In old writers, the word is used for a town or village fortified.
5. In a ship, there are two parts called by this name; the forecastle, a short deck in the fore part of the ship, above the upper deck; and the hindcastle, at the stern.
6. Castle in the air, a visionary project; a scheme that has no solid foundation.