To cry with a full, loud, continued sound; bellow, as a beast.To cry aloud, as in distress or anger.To make a loud, continued, confused sound, as winds, waves, a multitude of people shouting together, etc.; give out a full, deep sound; resound.To laugh out loudly and continuously; guffaw.To behave in a riotous and bullying manner.To make a loud noise in breathing, as horses in a specific disease. See roaring, n., 2.Synonyms and To bawl, howl, yell.To boom, resound, thunder, peal.To cry aloud; proclaim with loud noise; utter in a roar; shout: as, to roar out one's name.n. A full, loud, and deep cry, as of the larger beasts.n. A loud, continued, confused sound; a clamor; tumult; uproar.n. The loud, impassioned cry of a person in distress, pain, anger, or the like; also, a boisterous outcry of joy or mirth: as, a roar of laughter.