Entry 1 sense Webster, 1913 Electrolier · E·lec·tro·lier · IPA /əˌlɛk.tɹəˈlɪ.əɹ/ 01 n. A branching frame, often of ornamental design, to support electric illuminating lamps. 1. A branching frame, often of ornamental design, to support electric illuminating lamps.