Definitions of rook:

• noun:   common gregarious Old World bird about the size and color of the American crow
• noun:   (chess) the piece that can move any number of unoccupied squares in a direction parallel to the sides of the chessboard
• verb:   deprive of by deceit
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #9289)