0 past simple and past participle of bellow
1 to shout in a loud voice, or (of a cow or large animal) to make a loud, deep sound:
It bellowed and, of course, after that, being much more restive, it was much more difficult to fell.
A bull bellowed over a gate like a trumpet at the last judgment, and my horse reared up and threw me on to a hard road.
She bellowed and lowed so loudly that her agonies could be heard for many miles around.
Hearst was defeated by some 3,000 votes and his newspapers bellowed against the election fraud.