Dreaming of a demon in the first place is not pleasant and secondly it does not announce anything good. This indicates that what the dreamer has in mind is not good. Dreaming of fighting and killing the devil suggests that the dreamer is attempting to do something impossible that will produce disorders and loss. Dreaming that the devil is approaching with a smile and being friendly is a warning that the dreamer will engage in dishonest and dangerous affairs or business. If the devil presents himself rich and powerful, it hints that there will be poverty. If the devil is presented as a musician, it hints vice and degeneration. Dreaming of being in front of a ghost with a demons image insinuates that the dreamer is living an abnormal life, maybe immoral. A woman who dreams this indicates that she is losing the appreciation of her friends because of bad reputation. It also indicates insidious gossip.
Read more about dreaming of Demon in other dream meanings interpretations.