Entry 1 sense Webster, 1913 Electrolyte /ĭl-ĕkˌ-träl-īt'/ · E·lec·tro·lyte · IPA /ɪˈlɛk.tɹəˌlaɪt/ 01 n. A compound decomposable, or subjected to decomposition, by an electric current. 1. A compound decomposable, or subjected to decomposition, by an electric current.(Physics & Chem.)