A variety of the domestic dog, usually having large, drooping ears, esp. one which hunts game by scent, as the foxhound, bloodhound, deerhound, but also used for various breeds of fleet hunting dogs, as the greyhound, boarhound, etc.
A hound is a type of dog that assists hunters by tracking or chasing the animal being hunted. Compare with gun dogs, which assist hunters by identifying the location of prey. Hounds are not known to retrieve, see the retriever class of sporting dogs for that skill.