[ verb dih-fyooz; adjective dih-fyoos ]
/ verb dɪˈfyuz; adjective dɪˈfyus /

verb (used with object), dif·fused, dif·fusing.

verb (used without object), dif·fused, dif·fusing.

to spread.
Physics. to intermingle by diffusion.



Nearby words

  1. diffraction pattern,
  2. diffractive,
  3. diffractively,
  4. diffractometer,
  5. diffusate,
  6. diffuse abscess,
  7. diffuse cataract,
  8. diffuse cutaneous leishmaniasis,
  9. diffuse idiopathic skeletal hyperostosis,
  10. diffuse mesangial proliferation

Origin of diffuse

1350–1400; Middle English (< Anglo-French) < Latin diffūsus spread, poured forth. See dif-, fuse2

Related forms
Can be confuseddefuse diffuse

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for diffusely

British Dictionary definitions for diffusely


verb (dɪˈfjuːz)

adjective (dɪˈfjuːs)

Derived Formsdiffusely (dɪˈfjuːslɪ), adverbdiffuseness, noundiffusible (dɪˈfjuːzəbəl), adjectivediffusibility or diffusibleness, noun

Word Origin for diffuse

C15: from Latin diffūsus spread abroad, from diffundere to pour forth, from dis- away + fundere to pour


Avoid confusion with defuse

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for diffusely
Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for diffusely


[ dĭ-fyōōs ]


Not limited to one tissue or location; widespread.


To spread or to be spread widely, as through a tissue.
Related formsdif•fusi•ble (-fyōōzə-bəl) adj.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.