1 [only before noun]C
making a deep, very loud, continuous noise:
the roaring wind and waves
a fire that burns with a lot of flames and heat
3 British English informal
to sell a lot of something very quickly:
The stallholders were doing a roaring trade in burgers.
4 British English informal
to be extremely successful:
The new musical has been a roaring success.
5 British English informal
very drunk and noisy