sectarian UK /sɛkˈtɛəɹi.ən/US /sɛkˈtɛɹi.ən/adjective 4noun 2forms 3 adjective4 •Of, relating to, or partial to a sect.We were discussing solutions to the sectarian violence between Sunnis and Shias. •Dogmatic or partisan. •Parochial or narrow-minded. •Bigoted. noun2 •A member of a sect. •A bigot. formssectarians · more sectarian · most sectarian