So I believed that they had a set definition but I have heard alot of people under these names giving out a different story. In this thread I would like everyone to share what they think the definition of each one is, and eventually we all may be able to agree on a definition instead of making something untouchable logically. I'll start, I believe the definition for atheism, is the doctrine or belief or act of not believing in god, or believing there is atleast not one god. And theism, is the doctrine, belief or act of believing in at least one god. Hopefully we get somewhere.