An example of castle is to move the king piece two squares and place the nearest rook on the square which was jumped by the king.
A fortified building with a moat and a draw bridge where the king lives is an example of a castle.
A huge impressive mansion is an example of a castle.
Other Word Forms
Origin of castle
- Middle English castel from Old English and from Norman French both from Latin castellum diminutive of castrum kes- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition