mesmerism /ˈmɛz.məˌɹɪz.əm/ noun3 •The method or power of gaining control over someone's personality or actions.What is the secret mesmerism which friendship possesses, and under the operation of which a person ordinarily sluggish, or cold, or timid, becomes wise, active, and resolute, in another's behalf? — 1847 •The theory and practice of Mesmer himself or his disciples, which involved hypnosis and a superstructure of theory that included animal magnetism. •The state induced by hypnotic methods (especially those of Mesmer himself). formsmesmerisms