the GNU version of the Collaborative International Dictionary of English
n. The quality of being diffuse; especially, in writing, the use of a great or excessive number of word to express the meaning; copiousness; verbosity; prolixity.
The Century Dictionary and Cyclopedia
n. The quality of being diffuse; specifically, in speaking or writing, want of concentration or conciseness; prolixity.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the spatial property of being spread out over a wide area or through a large volume
Word Usage
"Note, however, that Edin et al did not directly analyze the "diffuseness" of the activations resulting from hypotheses 2 & 3."