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.
Definition of 'excited'. excited (ÉªksaÉªtÉªd ) If you are excited, you are so happy that you cannot relax, especially because you are thinking about something pleasant that is going to happen to you. I'm very excited about the possibility of playing for England's first team.