How much of a whole has actually been reached. Coverage is the honest answer to how complete a pass really was.
Old French covrir (to cover), from Latin cooperire (to cover completely), from com- (thoroughly) + operire (to close); how much of a whole has actually been laid over and reached, an honest measure of how complete a pass really was.
How much of a whole has actually been reached. It is the honest answer to a question a pass could otherwise get away with dodging.