roar definition

1. the sound made by a lion
2. make a loud noise, as of wind, water, or vehicles
• examples: The wind was howling in the trees
• examples: The water roared down the chute
3. act or proceed in a riotous, turbulent, or disorderly way; -R.A.Billington
• examples: desperadoes from the hills regularly roared in to take over the town
4. laugh unrestrainedly and heartily