Diffusion (noun). the act of diffusing, or the state of being diffused; a spreading; extension; dissemination; circulation; dispersion. Diffusion (noun). the act of passing by osmosis through animal membranes, as in the distribution of poisons, gases, etc., through the body.
Learner's definition of EXCITEMENT. 1. [noncount] : a feeling of eager enthusiasm and interest : the state of being excited. Our excitement was building/growing/mounting as the end of the game approached. His hands shook with excitement. The child cried out in excitement.
JOY, n. 1. The passion or emotion excited by the acquisition or expectation of good; that excitement of pleasurable feelings which is caused by success, good fortune,the gratification of desire or some good possessed, or by a rational prospect of possessing what we love or desire; gladness; exultation; exhilaration of spirits.