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.
A sudden, overpowering feeling of fear, often affecting many people at once. See Synonyms at fear. 2. A state of extreme anxiety, such as that involved in a panic attack. 3. a. A state of frantic activity, usually accompanied by extreme concern or anxiety: The office was in a panic as the deadline approached. b.