Defining "Atheism"

[Existentialist]

I was being facetious.

Sorry I missed that, it was too subtle for me!

Also, you seem to think that the belief that there are no god(s) must come first and is the cause of the 'lack of belief'.

It makes far more sense the other way around. Speaking personally, it was my lack of belief in claims that deities exist that inspired me to look into it to the point that I have decided I actually believe they do not exist. Many others (as my poll shows) do not hold the belief that god(s) do not exist, yet they are atheists, nonetheless... because they do not believe the claims that god(s) do exist. One can lack belief without actually believing that either choice is true.

I don't really think that the belief there are no gods 'comes first' if you mean in order of precedence, hierarchy or popularity. If you mean it tends to come first chronologically in the development of a god-denying atheist then you may be right, but I'd need to think about it more to say it makes sense that way round.