yes it is
it's the disbelief in religious beliefs
You can choose not to believe in something without entirely rejecting its possibility.
Most atheists simply reject the specifically defined gods of organized religions (refer to my previous post). I don't know any who would entirely dismiss the possibility of a deistic god.
Maybe if you didn't completely ignore the many people who have explained this to you, you'd have understood this by now.
I'll explain it to Quark though, maybe if I'm lucky you'll listen this time.
More specifically the disbelief in the existence of a God or deity. This is why I say earlier that I think a lot of people who say they are Atheist are in fact Agnostic.
Agnosticism vs gnosticism is about knowledge - whether or not the existence of gods is knowable
atheism vs theism is about personal belief - whether or not you belief gods to exist
It's not one dimensional, Atheist --- Agnostic --- Theist, as you're suggesting it
Simply saying "I'm agnostic" says nothing about your personal belief, simply saying "I'm atheist" does not mean you claim to know gods definitely do not exist. When an atheist says that God can be disproven, they are almost always talking about God. Capitalized. Proper noun. The Christian God, or whatever god belief is most prevalent in their area.
Agnostic atheist - "Gods can not be definitely proven or disproven to exist, but I choose not to believe in them"
(Following with your second sentence, most atheists are agnostic atheists)
Gnostic atheist - "Gods definitely do not exist"
Agnostic theist -"Gods can not be definitely proven or disproven to exist, but I choose to believe in them"
Gnostic theist - "God definitely do exist"