Invisible isn't the same as absent. Strawman again.
As for a definition of "absent": something for which no evidence of presence has been found.
My problem is that atheism purposedly mistakes lack of evidence for evidence of non-existence. No research broad enough has been made of the entire universe and all physical dimentions that can soundly conclude that "No deities exist". That's why it is such an extraordinary claim that relies simply on probability. The simplest explanation that is grounded on reality is: "The only thing that can be said about God is that it's absent".
Eden