the GNU version of the Collaborative International Dictionary of English
n. The quality of being porous.
n. The open parts; the interstices of anything.
The Century Dictionary and Cyclopedia
n. Porosity.
n. The pores or porous parts of anything.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the property of being porous; being able to absorb fluids
Word Usage
"He is worried by the roadside bombings of the Taliban and the insecurity and "porousness" on the border is a problem, calling for a "new security strategy" which is being discussed at the moment."