To roar; make a hollow, loud noise, as a bull, cow, or deer.Of persons, to make any violent outcry; vociferate; clamor: used in ridicule or contempt.To roar, as the sea in a tempest, or as the wind when violent; make a loud, hollow, continued sound.To utter in a loud deep voice; vociferate: generally with out or forth.n. A roar, as of a bull; a loud outcry.