God = Possible initiator of the universe or multiverse
And that's already a bit too much in terms of assumptions for my tastes.. but you've got to start somewhere..
One of the first thing you may want to try is to define where this God came from?:
God = uncreated infinite eternal reality; possible initiator of the existence of physical universe
god = force which is in part responsible for creation and functioning of universe but not independent from some other agent which brought it into existence