1. (

• diffusion

) (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 ;

2. (

• diffusion

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

3. (

• dissemination ,
• diffusion

) the property of being diffused or dispersed ;

4. (

• dispersion ,
• dispersal ,
• dissemination ,
• diffusion

) the act of dispersing or diffusing something; "the dispersion of the troops"; "the diffusion of knowledge" ;