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.
(Ã´râ²gÄzâ²Ém) n. 1. The highest point of sexual excitement, characterized by strong feelings of pleasure and marked normally by ejaculation of semen by the male and by involuntary vaginal contractions in the female. Also called climax. 2. A similar point of intensity of emotional excitement.