Definitions For Castle

noun

• Interchanging the positions of the king and a rook
• A large building formerly occupied by a ruler and fortified against attack
• (chess) the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard
• A large and stately mansion
• A large building usually with high, thick walls and towers that was built in the past to protect against attack
• A large expensive house
• A piece in the game of chess that looks like a castle tower

verb

• Move the king two squares toward a rook and in the same move the rook to the square next past the king