1. (noun)hound, hound dog any of several breeds of dog used for hunting typically having large drooping ears
2. (noun)cad, bounder, blackguard, dog, hound, heel someone who is morally reprehensible "you dirty dog"
3. (verb)hound, hunt, trace pursue or chase relentlessly "The hunters traced the deer into the woods"; "the detectives hounded the suspect until they found him"