(1)a breed of large powerful hound of European origin having very acute smell and used in tracking
(2)非常に鋭い嗅覚を持ち、追跡に使われる欧州原産の大型の頑強な猟犬
(3)any dog trained to assist police especially in tracking
(4)特に追跡で警察を助ける訓練を受けた犬