Definition of rook

• n. - Mist; fog. See Roke.
• v. i. - To squat; to ruck.
• n. - One of the four pieces placed on the corner squares of the board; a castle.
• n. - A European bird (Corvus frugilegus) resembling the crow, but smaller. It is black, with purple and violet reflections. The base of the beak and the region around it are covered with a rough, scabrous skin, which in old birds is whitish. It is gregarious in its habits. The name is also applied to related Asiatic species.
• n. - A trickish, rapacious fellow; a cheat; a sharper.
• v. t. & i. - To cheat; to defraud by cheating.