OK, I'll grant you that this definition does not flow very smoothly. I'm certain it does not rise to the level of a dictionary definition. It may even lack another element or two. Even so, I think it has enough meat now to make for some profitable chewing. So let's chew.
Faith is belief.
That may seem redundant. But it isn't, because this kind of belief is a conviction, a certainty. When Joshua said the river would open up, he was absolutely convinced. Faith is not shackled by the physically and humanly obvious. We humans get hung up on the obvious.