Lunarian UK /luːˈnɛəɹi.ən/US /luˈnɛɹi.ən/noun 3adjective 1forms 2 noun3 •An inhabitant of Earth's Moon (Luna): either an indigenous one or a human one. •A maritime navigator who uses the Moon to determine longitude without the need for an accurate clock. •A member of the New York Science Fiction Society. adjective1 •Pertaining to the inhabitants of Luna (Lunarians). formsLunarians · lunarians