the GNU version of the Collaborative International Dictionary of English
n. Unsubstantiality; unreality.
The Century Dictionary and Cyclopedia
n. The quality of being insubstantial; unsubstantiality.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. lacking substance or reality
n. lack of solid substance and strength
Word Usage
"In this sense, the female form, both the body and the word, is invariably somehow tied to "ugly feelings" because of the supposed 'insubstantiality' of them – which is a point about the Sianne Ngai book that Silliman overlooks."