1. (noun)boom, roar, roaring, thunder a deep prolonged loud noise
2. (adj)bellow, bellowing, holla, holler, hollering, hollo, holloa, roar, roaring, yowl a very loud utterance (like the sound of an animal) "his bellow filled the hallway"
3. (adverb)booming, flourishing, palmy, prospering, prosperous, roaring, thriving very lively and profitable "flourishing businesses"; "a palmy time for stockbrokers"; "a prosperous new business"; "doing a roaring trade"; "a thriving tourist center"; "did a thriving business in orchids"
4. (adverb)roaring extremely "roaring drunk"
Definition of 'roaring'
Webster Dictionary
1. (noun)roaring a loud, deep, prolonged sound, as of a large beast, or of a person in distress, anger, mirth, etc., or of a noisy congregation
Definitions of roaring 
