What is religion? There are a number of definitions, but I think the second one I found fits best. religion: a specific set of fundamental beliefs and practices generally agreed upon by a number of persons or sects. (judaism, christianity, islam, etc.) One problem with religion is that ( in perticular these three ) each one claims to be the only one. This is not a calling together of religions into one body, that is, there's one being with many different names. But the focus has been so much on how to worship, that many have forgotten about...who to worship.