Eternal can also mean “outside time” as God is.
Interesting, but I couldn't disagree more. God is timeless: He is outside of our concept of time. He always was, is and will be. He is immortal, i.e., not subject to death, which equates with endlessness. This is where the Late Latin term "eternal" fits in - without beginning and without end. Do you see that? Olam, aion and aionios all have to do with time, and are not proper terms to define the "lenght of time" God exists. Time is a human oriented measurement restricted to the duration of the subject or person applied. Please don't take this as a put-down. I once said and believed the same thing, until I decided to do a little study on it: that changed my mind and outlook on God.