ROOK (3)

Rook, n. [[F. roc (cf. Sp. roque), fr. Per. & Ar. rokh, or rukh, the rook or castle at chess, also the bird roc (in this sense perhaps a different word); cf. Hind. rath a war chariot, the castle at chess, Skr. ratha a car, a war car. Cf. Roll.]] (Chess) One of the four pieces placed on the corner squares of the board; a castle.