castle

noun

1. a large and stately mansion

Similar word(s): palace

Definition categories: man–made, hall, manse, mansion, residence

2. a large building formerly occupied by a ruler and fortified against attack

Definition categories: man–made, fortification, munition

3. (chess) the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard

Similar word(s): rook

Definition categories: man–made, chessman

4. interchanging the positions of the king and a rook

Similar word(s): castling

Definition categories: act

verb

1. move the king two squares toward a rook and in the same move the rook to the square next past the king

Definition categories: competition, go, move