The quality of being spread out or scattered rather than concentrated in one place.
From diffuse (Latin diffusus, 'poured out') + -ness (Old English suffix forming abstract nouns). The suffix -ness converts the adjective diffuse into a noun describing the state or quality of being diffuse.
This word captures something scientists measure in gases and liquids—how much a substance spreads instead of staying put. The Romans' term for 'poured out' perfectly describes how smoke diffuses through air or ink dissolves into water.
Complete word intelligence in one call. Free tier — 50 lookups/day.