diffusion

Noun

• the act of dispersing or diffusing something
  • the dispersion of the troops
    
  • the diffusion of knowledge
    

• the property of being diffused or dispersed

• the spread of social institutions (and myths and skills) from one society to another

• (physics) the process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concentration

Related words

• Synonyms: 
  dispersion , dispersal , dissemination