Definition of "excitation" in English

noun

1. The act of exciting or putting in motion; the act of rousing up or awakening.

2. The act of producing excitement (stimulation); also, the excitement produced.

3. (physiology) The activity produced in an organ, tissue, or part, such as a nerve cell, as a result of stimulation.

4. (physics) A transition of a nucleus, atom or molecule to an excited state by the absorption of a quantum of energy; the opposite of relaxation.