Entry 3 senses · 2 variants Webster, 1913 Promethean · Pro·me·the·an · IPA /pɹəˈmi.θi.ən/ a. n. 01 a. Of or pertaining to Prometheus. See Prometheus. 1. Of or pertaining to Prometheus. See Prometheus. See: Prometheus 2. Having a life-giving quality; inspiring. 02 n. An apparatus for automatic ignition. 1. An apparatus for automatic ignition.(Old Chem.)