Pronunciation: (rôr'ing, rōr'-),[key] —n. 1. the act of a person, animal, or thing that roars.
2. a loud, deep cry or sound or a series of such sounds.
3. Vet. Pathol.a disease of horses, caused by respiratory obstruction or vocal cord paralysis, and characterized by loud or rough breathing sounds.
—adj. 1. making or causing a roar, as an animal or thunder.
2. brisk or highly successful, as trade: He did a roaring business selling watches to tourists. 3. characterized by noisy, disorderly behavior; boisterous; riotous: roaring revelry. 4. complete; utter; out-and-out: a roaring idiot; a roaring success.