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Borrowed from Latin diffusionem (accusative of diffusio), from verb diffundere; can be decomposed as diffuse +‎ -ion.



diffusion (countable and uncountable, plural diffusions)

  1. The act of diffusing or dispersing something, or the property of being diffused or dispersed; dispersion.
  2. (physics) The scattering of light by reflection from a rough surface, or by passage through a translucent medium.
  3. (physics) The intermingling of the molecules of a fluid due to random thermal agitation.
  4. The spread of cultural or linguistic practices, or social institutions, in one or more communities.
  5. (marketing) The gradual spread and adoption of goods or services.
  6. (physics, weather) Exchange of airborne media between regions in space in an apparently random motion of a small scale.
  7. The movement of water vapor from regions of high concentration (high water vapor pressure) toward regions of lower concentration.


The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout#Translations.

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Borrowed from Latin diffusio, diffusionem. Synchronically analysable as diffuser +‎ -ion.


diffusion f (plural diffusions)

  1. broadcasting, showing
  2. dissemination, diffusion (of culture, knowledge, etc.)
  3. circulation (of a news medium)
  4. (physics) diffusion

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