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What is a "castle"?
A castle is a large, fortified structure built primarily for protection and residence, often associated with royalty, nobility, or military leaders. Castles typically feature high walls, towers, gates, and sometimes a moat to defend against attacks. Inside, they include living quarters, great halls, and storage areas, designed to support life during sieges. Historically, castles were built in strategic locations to control territory or guard important routes. Over time, many castles have become symbols of heritage, attracting visitors for their architectural beauty and historical significance.
(chess) a rook, the piece that moves any number of unoccupied squares along a rank or file
a large, impressive mansion or stately home
the chess move in which the king and a rook swap positions
to move the king two squares toward a rook and simultaneously place that rook on the square immediately past the king



























