A domestic dog of any of various breeds commonly used for hunting, characteristically having drooping ears, a short coat, and a deep resonant voice. A dog. A contemptible person; a scoundrel. One who eagerly pursues something: a gossip hound. A devotee or an enthusiast: a coffee hound. To pursue relentlessly and tenaciously. See Synonyms at harass. To urge insistently; nag: hounded me until I agreed to cut my hair.