No, actually, but I really don't want to get into that in this thread.
Are you implying Atheism is a religion?
If you are, then your definition is severly flawed.
It should then read simply...
"Organised belief"
In which case pretty much everything can be a religion, and it makes the word pretty much meaningless.
No?
Of course, that is the way Hinduism sees it. Whether you have a position, or don't have a position about God (theism, atheism, or agnosticism), they are all beliefs. Both theism and atheism are positions about God. Religion would be organised position. Atheism is not a religion if there is no organised philosophy behind it, like the Samkhyas.
In the west, atheism is ill-defined as a philosophy, I think.
Everyone comes up with their own positions on an individual basis.