Pronunciation: (rôr, rōr),[key] —v.i. 1. to utter a loud, deep cry or howl, as in excitement, distress, or anger.
2. to laugh loudly or boisterously: to roar at a joke. 3. to make a loud sound or din, as thunder, cannon, waves, or wind.
4. to function or move with a loud, deep sound, as a vehicle: The automobile roared away. 5. to make a loud noise in breathing, as a horse.
—v.t. 1. to utter or express in a roar: to roar denials. 2. to bring, put, make, etc., by roaring: to roar oneself hoarse.
—n. 1. a loud, deep cry or howl, as of an animal or a person: the roar of a lion. 2. a loud, confused, constant noise or sound; din; clamor: the roar of the surf; the roar of lively conversation from the crowded party. 3. a loud outburst: a roar of laughter; a roar of approval from the audience.