Aw no Sassy, turns out I was right all along - there's ambiguity in the meaning. Here for example from Wiki:
"Verb[edit]
disbelieve (third-person singular simple present disbelieves, present participle disbelieving, simple past and past participle disbelieved)
1. To not believe; to exercise disbelief.
2. To actively deny (a statement, opinion or perception).
He chose to disbelieve the bad news as inconceivable.
3. To cease to believe."
As I explained to you, you were correct in the sense that you found a definition you liked aligned to option 1, but not in respect of the meaning at option 2.
Either way though, your basic point remains wrong - the "faith" the religious use for "God" is qualitatively different from the reasoning atheists use to unpick the arguments they attempts for it.
FULL STOP!