castling
chess move in which the king moves 2 squares toward a rook, while the rook moves to the square passed over by the king
en-US/ˈkæsəlɪŋ/
en-GB/ˈkɑːslɪŋ/
chess move in which the king moves 2 squares toward a rook, while the rook moves to the square passed over by the king