any member of three breeds of sturdily built dog with a wiry, pepper-and-salt or black coat, whiskers, and bushy eyebrows, orig. bred in Germany: the standard schnauzer is 17 to 23 in (43.2-58 cm) high at the shoulder; the miniature schnauzer, 12 to 14 in (30.5-35.5 cm); the giant schnauzer, over 23.5 in (59.7 cm)
Ger < schnauzen, to snarl, growl < schnauze, snout
See schnauzer in American Heritage Dictionary 4
Any of three German breeds of dog of a range of sizes, having a wiry pepper-and-salt or black coat and a blunt muzzle with wiry whiskers.