Atheism is the rejection of deity. It's an affirmation that there is no god.
I certainly never made such claim although I don't follow a religion.
In general usage, atheism can simply mean 'disbelief in a supreme being or beings'.
I don't call myself an atheist, particularly either. Atheist, agnostic or secular are only required due to the persistence of religion.
Let's not dodge questions though. I don't believe in any Abrahamic god(s), any of these....
and if you don't, then you are as 'atheist' as me. The difference between us seems to be that I think that religion can be challenged under suitable circumstances - including on Topix.