"a midwestern state in central United States; a border state during the American Civil War, Missouri was admitted to the Confederacy without actually seceding from the Union"
"the longest river in the United States; arises in Montana and flows southeastward to become a tributary of the Mississippi at Saint Louis"
"a member of the Siouan people formerly inhabiting the valley of the Missouri river in Missouri"
"a dialect of the Chiwere language spoken by the Missouri"