n. The act of exciting; stimulation.n. The state of being excited or roused into action; agitation; sensation; commotion: as, the news caused great excitement; an excitement of the people.n. In medicine, a state of increased, and especially unduly increased, activity in the body or in any of its parts.n. That which excites or rouses; that which moves, stirs, or induces action; a motive.