rook
Cross references: 1. castle 1. rook \'ru.k\ n [ME, fr. OE hro-c; akin to OE hrfn raven - more at MRAVEN : a common Old World gregarious bird (Corvus frugilegus) about the s ize and color of the related American crow 2. rook vt : to defraud by cheating or swindling 3. rook n [ME rok, fr. MF roc, fr. Ar rukh, fr. Per] : a chess piece that moves parallel to the sides of the board across any n umber of unoccupied squares