Hello, I know you've gotten a lot of pretty crappy answers, so i am going to give you one that isn't quite so snarky. but not particularly doing your work for you.
Just to let you know, if you want a definition you are asking for a fact as decided by a group of scholars and put in an encyclopedia or something, for the most part that should be an unbiased dry bare bones description. There is no point of view.
Either way, you cannot get a Christian point of view on a pagan website, nor from a pagan... we aren't christian, we don't have that point of view, and a lot of us have a pretty poor opinion of that point of view.
Like several people said before, ouija boards and tarot cards are divination tools. So are horoscopes.
Witchcraft is generally understood as the ritual or ceremonial part of an earth-based pagan religion.
Satanists of the Church of Satan do not believe in Satan.
I will put a link to religious tolerance.org's satanism page which has a lot of detailed information for you, and a link to a few paganism sites with the info you need. DONT go to the forum unless you have a well thought out, well phrased question based on something specific, AFTER you have read ALL of the information or you will get the same reaction you got here.