n. The quality of being spacious; largeness of extent; extensiveness; roominess.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. spatial largeness and extensiveness (especially inside a building)
Word Usage
"In other cities on this continent, the argument apparently is, "We have plenty of room, spaciousness is desirable on our own account, there is no earthly reason for our running up to heaven, therefore let us build sky scrapers.""