Sheesh--sounds like you are looking for an argument. No--I don't need the definition to believe in anything. My belief comes from my faith in Christ and what the bible teaches. Hope that is OK with you.
Absolutely. I'm not looking for an argument. I'm just giving you my point of view that I do not need to believe in demons to know that evil exists. And that just because a word like incubus exists does not mean the actual creature does. My faith in Christ tells me there is enough problems in the world without making up more.