1. To utter a loud, fierce, guttural cry in an unrestrained manner or for some prolonged period of time. The drunk stood on the corner roaring away, obviously incensed over something to which no one but himself was privy. We can always hear the lions roaring away whenever we walk past the zoo.

2. To depart at great speed while making a huge din. Typically said of a motor vehicle or someone riding within one. She called something out to me, but I couldn't quite make it out as the train roared away. The three burglars burst through the doors of the bank, their bags of money in tow, and roared away in a getaway car that was waiting for them in the alley.