pro·me·thean \-thēən, -thyən\adjective Usage: usually capitalized Etymology: Latin prometheus Promethean (from Greek promētheios, from Promētheus Prometheus, the Titan pioneer of civilization) + English -an : of, relating to, or resembling Prometheus, his experiences, or his art; especially: daringly original or originative < the painter's true Promethean craft — William Wordsworth > < there will always be nonconformists, bitter rebels, Promethean pioneers — C.I.Glicksberg >