rook /rʊk/ BrE AmE noun [countable]
[ Sense 1: Language: Old English ; Origin: hroc ]
[ Sense 2: Date: 1200-1300 ; Language: Old French ; Origin: roc , from Arabic rukhkh , from Persian ]
1 . a large black European bird like a ↑ crow
2 . one of the pieces in a game of ↑ chess SYN castle