A large fortified building or group of buildings with thick walls, usually dominating the surrounding country, A place of privacy, security, or refuge, Any strong, imposing, and stately mansion, intransitive verb_ Games To move (the king in chess) by castling, To place in or as if in a castle, verb_ chess To perform the move of castling, cricket To bowl a batsman with a full-length ball or yorker such that the stumps are knocked over