Wrong-o. Religion requires belief, not faith. Atheism is a belief. It requires a conscious decision to deny the existence of a God (or Gods).
This seems a ridiculous standard. I believe RGS is stupid...is that a religion? I believe in evolution, another religion? I believe in the UN, another religion? Do RGS and Bern believe in the religion that rejects global warming? To say that anything anyone believes in is a religion seems to vastly distort the meaning of religion.
It would also seem to mean that a belief in Christianity is not really one religion, but rather many. That is there is the religion that believes in Christianity, the one that doesn't believe in Hinduism, the one that doesn't believe in Islam, etc, etc. So Christianity is not really one religion but, under that definition, encompasses many.
I think a decent definition would be a belief in a supernatural theory of how the world came into existence, as pretty much all religions attempt to explain that. Under this theory atheism is not a religion. It seems that most religions center around the affirmation of things that exist, not the denial of things that exist.