Definition of "castling" [cast•ling•cas•tling]

• An abortion, or a premature birth. (noun)
• The second or third swarm of bees which leaves a hive in a season. (noun)
• A miniature cast or mould. (noun)
• One that is cast. (noun)
• A move in which the king moves two squares towards a rook, and the rook moves to the other side of the king; the action of the verb to castle. (noun)

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• "Another high-level member of Mr. Putin's circle, Finance Minister Alexei Kudrin, resigned from the government in September after the so-called castling of leaders was announced."
• "Mr. Putin, 59 years old, is expected to switch places with his longtime protégé, President Dmitri Medvedev, after March presidential elections in what critics and Kremlin officials alike have called a "castling"—referring to a chess move—of the two leaders."
• "If Black retires the Bishop from his unsafe position, White permanently prevents Black from castling, which is bound to be fatal in view of the open K file -- e.g. 11. ..."