Definition of "diffuse"

verb:
- To spread over or through as in air, water, or other matter, especially by fluid motion or passive means.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
- To be spread over or through as in air, water, or other matter, especially by fluid motion or passive means.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
adjective:
- Everywhere or throughout everything; not focused or concentrated.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License