It seems people have different definitions of atheism. But I bet if you ask an average atheist what it means to be one, they’ll reply simply that they don’t believe in god (as defined to have human properties or qualities) which is a very reasonable statement. It is NOT seeking to prove that “god” doesn’t exist because that’s unprovable. It all hinges on how one defines god and even theists can’t seem to make up their minds.
Discussion
Fair points and I agree on all statements.
In fact, a section of my manuscript in progress is called "bifurcating the g word".
Bifurcation of capital G God versus lowercase g gods/goddesses is an important concept for understanding how seemingly polytheistic religions are not inconsistent with monotheistic religions. There's more to it than that, but it's mostly a definition issue.