1.a deep prolonged loud noise
2.a very loud utterance (like the sound of an animal);
his bellow filled the hallway
3.the sound made by a lion
1.make a loud noise, as of wind, water, or vehicles;
The wind was howling in the trees
2.utter words loudly and forcefully;
`Get out of here,' he roared
3.emit long loud cries;
wail in self-pity
4.act or proceed in a riotous, turbulent, or disorderly way;
desperadoes from the hills regularly roared in to take over the town-R.A.Billington
5.make a loud noise, as of animal;
The bull bellowed
6.laugh unrestrainedly and heartily