Charonian /kəˈɹoʊnɪən/adjective 1noun 1forms 1 adjective1 •Of or relating to Charon.The Charonian journey will soon be taken. noun1 •An inhabitant of Charon (a moon of Pluto).The Charonians were proud of their frozen hell. Styxville was like Plutopolis, only less so. — 1990 formsCharonians