meaning of diffusion
1.  The act of diffusing, or the state of being diffused; a spreading; extension; dissemination; circulation; dispersion. 
2.  The act of passing by osmosis through animal membranes, as in the distribution of poisons, gases, etc. , through the body.  Unlike absorption, diffusion may go on after death, that is, after the blood ceases to circulate. 
3.  the act of dispersing or diffusing something; "the dispersion of the troops"; "the diffusion of 
						">knowledge"
						 
