'Diffuseness' definitions:

Definition of 'diffuseness'

From: WordNet
noun
The spatial property of being spread out over a wide area or through a large volume

Definition of 'Diffuseness'

From: GCIDE
  • Diffuseness \Dif*fuse"ness\, 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. [1913 Webster]