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castle, palace | a large and stately mansion | |
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castle, castling | interchanging the positions of the king and a rook | |
V2 |
castle | [in chess] move the king two squares toward a rook and in the same move the rook to the square next past the king | |
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castle | a large building formerly occupied by a ruler and fortified against attack | |
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castle, rook | [in chess] the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard |