castle

Universal Words noun 1 a large strong building with thick high walls and towers, built in the past by kings or queens, or other important people, to defend themselves against attack: Windsor Castle * a medieval castle seealsoSANDCASTLE 2 (also rook) (in the game of CHESS) any of the four pieces placed in the corner squares of the board at the start of the game, usually made to look like a castle IDIOMS (build) castles in the air (BrE) (to have) plans or dreams that are not likely to happen or come true: As a child he would wander round the boatyards, building castles in the air about owning a boat one day. moreatENGLISHMAN