I apologise if I'm the cause of the arguing. I wasn't trying to tell atheists what they believe or anything like that, I was just pointing out that according to the dictionary definitions, it's possible to convert to atheism. If converting means changing, and if atheism is an opinion (I don't see why that wouldn't be so) then you can convert to atheism. But words have connotantions, and of course, when we talk about converting, we usually mean converting to a religion or from one religion to another. So I understand the reluctance to go with the dictionary definitions which is why perhaps new terms should be devised that reflect what atheists wish to say about themselves, or not say about themselves, although of course not all atheists will necessarily agree.