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.
â¢ EXCITED (adjective). The adjective EXCITED has 4 senses: 1. in an aroused state. 2. (of persons) excessively affected by emotion. 3. marked by uncontrolled excitement or emotion. 4. (of e.g. a molecule) made reactive or more reactive. Familiarity information: EXCITED used as an adjective is uncommon.. in an aroused state. 2. (of persons) excessively affected by emotion. 3. marked by uncontrolled excitement or emotion. 4. (of e.g. a molecule) made reactive or more reactive. Familiarity information: EXCITED used as an adjective is uncommon.