Definition of "Roar" :

noun: a very loud utterance (like the sound of an animal)

noun: a deep prolonged loud noise

noun: the sound made by a lion

verb: laugh unrestrainedly and heartily

verb: utter words loudly and forcefully

"Get out of here,' he roared."

verb: make a loud noise, as of wind, water, or vehicles

"The water roared down the chute."

verb: emit long loud cries

verb: make a loud noise, as of animal

verb: act or proceed in a riotous, turbulent, or disorderly way

"Desperadoes from the hills regularly roared in to take over the town."