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Noun: castle  kã-sul
  1. A large and stately mansion
    - palace
     
  2. A large building formerly occupied by a ruler and fortified against attack
     
  3. (chess) the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard
    - rook
     
  4. Interchanging the positions of the king and a rook
    - castling
Verb: castle  kã-sul
  1. (chess) move the king two squares toward a rook and in the same move the rook to the square next past the king

Derived forms: castled, castles, castling

Type of: chess move, chess piece, chessman, fortification, go, hall, manse [archaic], mansion, mansion house, move, munition, residence

Encyclopedia: Castle, Oklahoma