CASTLE

Definitions

1. 1. A fortified residence, especially that of a prince or nobleman; a fortress. The house of every one is to him castle and fortress, as well for his defense againts injury and violence, as for his repose. Coke. Our castle's strength Will laugh a siege to scorn. Shak.
2. 2. Any strong, imposing, and stately mansion.
3. 3. A small tower, as on a ship, or an elephant's back.
4. 4. A piece, made to represent a castle, used in the game of chess; a rook. Castle in the air, a visionary project; a baseless scheme; an air castle; -- sometimes called a castle in Spain (F. Château en Espagne).