- the act of an animal, person, etc. that roars
- the loud, deep sound made by an animal, etc. that roars
- a disease of horses, characterized by loud, hoarse, rasping breathing
- that roars; loud; noisy
- boisterous, brawling, etc.
- Informal very active or successful; brisk: a roaring business
to the point of being noisy, boisterous, etc.: roaring drunk
- Very lively or successful; thriving: a roaring trade.
- Used as an intensive: roaring drunk.
- Present participle of roar.