electrotherapyPronunciation: /ɪˌlɛktrə(ʊ)ˈθɛrəpi/Definition of electrotherapy noun [mass noun] the use of electric currents passed through the body to stimulate nerves and muscles, chiefly in the treatment of various forms of paralysis. Derivatives electrotherapeutic adjective electrotherapeutical adjective electrotherapist noun electrotherapy in other Oxford dictionaries Definition of electrotherapy in the US English dictionary