Atheism is just as irrational as Theism.

[ElDinero]

That's not true as I said before an atheism is defined as:

"Atheism is the lack of belief in a god or gods."

This implies that the word "god" has meaning, while it is actually meaningless, therefore atheists hold an illogical position.

I think this is just boring silliness, to be honest. Whether you're right or wrong, we both know what we mean. If theists define their God, I can lack belief in that definition of God, despite your assertion that the word has no meaning. They give it meaning by giving it properties and characteristics, like this:

Theist: My God answers prayers, shoots lightning bolts at the wicked and is merciful.

They've provided the definition. I then ask for the evidence. It's a non-point you're making.