Missouri

(noun) 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. Synonyms: Show Me State, MO.

(noun) the longest river in the United States; arises in Montana and flows southeastward to become a tributary of the Mississippi at Saint Louis. Synonyms: Missouri River. Example: "The missouri and mississippi rivers together form the third longest river in the world."

(noun) a member of the Siouan people formerly inhabiting the valley of the Missouri river in Missouri.

(noun) a dialect of the Chiwere language spoken by the Missouri.