Common gregarious Old World bird about the size and color of the American crow; SYN. Corvus frugilegus.
Gregarious European crow Corvus frugilegus. The plumage is black and lustrous and the face bare; a rook can grow to 45 cm/18 in long. Rooks nest in colonies at the tops of trees.

Either of two pieces of each color in a set of chessmen having the power to move along the ranks or files across any number of unoccupied squares — called also castle.

Rookie

To defraud by cheating or swindling