definition of
excitation

[1] #1 excitation n. [excitement, inflammation, fervor, fervour] the state of being emotionally aroused and worked up; "his face was flushed with excitement and his hands trembled"; "he tried to calm those who were in a state of extreme inflammation". wn

[2] #2 excitation n. [innervation, irritation] the neural or electrical arousal of an organ or muscle or gland. wn

[3] #3 excitation n. [excitement] something that agitates and arouses; "he looked forward to the excitements of the day". wn