v to make a hollow, loud noise, as an enraged bull.
2. bellow ·noun a loud resounding outcry or noise, as of an enraged bull; a roar.
3. bellow ·vt to emit with a loud voice; to shout;
used with out.
4. bellow ·v to bowl; to vociferate; to clamor.
5. bellow ·v to roar; as the sea in a tempest, or as the wind when violent; to make a loud, hollow, continued sound.