It’s a common trope among some New Atheists looking for more and better rhetorical tools for their identity politics that atheism is a-theism, and therefore means “a lack of belief in God or gods” and absolutely nothing else. This definition generally aids rhetorically in asserting atheism as a sort of default position for humanity. A recent example:
Apart from being a wildly naive etymological fallacy that ignores literally millennia of historical usage, the explicit denial of any qualification whatsoever renders all entities in the entire universe atheist, animate or otherwise, including all believers during the vast majority of their lives when they are not actively engaged in believing. I would suggest that this kind of petty and naive identity politics does neither service nor justice to atheism or atheists.