Manichaean /ˌmænɪˈkiːən/adjective 4noun 1forms 1 adjective4 •Of or relating to Manichaeism. •Of or relating to a worldview of distinct good and evil, especially to the exclusion of other possible categories.Barack Obama spoke of a world without these Manichean dualities. He dismissed the notion of “red” and “blue” America. — 2008 •Using light and dark to represent good and evil. •Of or concerning a Manichaean. noun1 •A follower of Manichaeism. formsManichaeans