Meaning of DIFFUSION in English

noun the act of diffusing, or the state of being diffused; a spreading; extension; dissemination; circulation; dispersion.

2. diffusion ·noun 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.

Webster English vocab.      Английский словарь Webster.