noun. ['ˌɛksaɪˈteɪʃən'] something that agitates and arouses.
noun. ['ˌɛksaɪˈteɪʃən'] the neural or electrical arousal of an organ or muscle or gland.
noun. ['ˌɛksaɪˈteɪʃən'] the state of being emotionally aroused and worked up.