Missourian /mɪˈzʊɹi.ən/adjective 2noun 2forms 3 adjective2 •From, of or pertaining to Missouri. •Of or relating to the Missouri Synod, a Lutheran denomination. noun2 •A native or resident of the state of Missouri in the United States of America. •A supporter of the Missouri Synod. formsMissourians · more Missourian · most Missourian