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Definition of castle:

  1. A fortified residence, especially that of a prince or nobleman; a fortress.
  2. A piece, made to represent a castle, used in the game of chess; a rook.
  3. A small tower, as on a ship, or an elephant's back.
  4. Any strong, imposing, and stately mansion.
  5. To move the castle to the square next to king, and then the king around the castle to the square next beyond it, for the purpose of covering the king.


castling, alcazar, fastness, keep, manor, building, stronghold, acropolis, safehold, fort, palace, donjon, refuge, fortress, hold, seat, fortification, citadel, rook.

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