noun
1. usually capitalized G&D : a breed of smooth-coated dogs that is believed to have originated in Germany several centuries ago, that is of massive size, great strength, and 28 inches at minimum height, that ranges in color from fawn through brindle, blue, and harlequin, that was formerly used chiefly for hunting wild boar, and that has been much used for draft purposes
2. often capitalized G & usually capitalized D : a dog of the Great Dane breed