I guess I didn’t make myself clear. I did not search the net, but rather looked up the words in several dictionarys. The ones I looked in had apparently never heard of weak atheism, they called it agnosticism. After searching several other locations I found a dictionary that gave as a second meaning your definition of weak atheism. Of course they gave the same definition to agnosticism. It seems that the general usage of atheism is strong atheism and agnosticism is weak atheism. The concept you use for agnosticism is rarely considered.
As you note, dictionaries tell you nothing more than popular usage. What happens when that usage has been taken over by slander? The dictionary also notes that atheists are “wicked.” Should we take that at face value as well? Indeed, many dictionaries are still recovering from the time when everything had to be defined in such a way that it was impossible, by definition not to believe in god (atheists, you see, only “deny” God, a definition that itself implies that there is a God to deny). God is defined as “the creator of the universe” but other supernatural things and beliefs are “the belief that…” or “what some believe to be”
If you want to find out what atheists are, I suggest you ask atheists.