the GNU version of the Collaborative International Dictionary of English
n. The quality of being inconceivable; inconceivableness.
The Century Dictionary and Cyclopedia
n. The quality of being inconceivable.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the state of being impossible to conceive
"The possibility that there is no life after death, no paranormal events, no God and no greater meaning to their existence ponies up an unimaginably vast array of negative emotions as to the "inconceivability" of the above."