noun. The quality of being diffuse; specifically, in speaking or writing, want of concentration or conciseness; prolixity.

noun. 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.

noun. The state or quality of being diffuse.

noun. The result or product of being diffuse.

noun. the spatial property of being spread out over a wide area or through a large volume

"Note, however, that Edin et al did not directly analyze the "diffuseness" of the activations resulting from hypotheses 2 & 3."