n. The state or condition of being obvious, plain, or evident to the eye or the mind.
n. The state of being open or liable, as to anything threatening or harmful.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the property of being easy to see and understand
Word Usage
"I agree with #3 – this rivals in obviousness the idea of using 1-click to buy something online, which resulted in interminable squabbling and litigation about who thought of such an obvious thing first. —"