Traditional Meanings:

European (Judeo-Christian)

• Evil if heard roar in the air -In the dream you hear roar, then this dream warns you that there are evil spirits which are not disposed positively towards you and they try to make harm;
• Important decisions if roar of water – The roar of water in the dream indicates that you make good decisions in order to avoid fails in near future;

Arabian (Islamic)

• Unpleasant event if hear roar from water – Such a dream indicates unfortunate journey or unpleasant events in near future;
• Jokes if roar of wind – You hear roar of wind in your dream, this dream means that you will have stupid pranks.