@Setanta,
Silly Set. I've supplied a definition from a well known and respected source, and yet you persist in finding other, more obscure sources that back your view. You are all the things you claim me to be.
The logic of the language is clear. Even if you or even most other people can't follow it, that doesn't make it any less clear.
A theist is a person who believes in god or gods.
An atheist is a person who believes there are no gods.
Then there are those who don't define themselves based on the delusions of the past. I am not an atheist because my beliefs have nothing to do with the existence or non-existence of gods.
It is one of the great ironies, that people who believe themselves free from beliefs about gods (atheists) still define themselves in contrast to ideas of gods.