noun (n)

• 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(noun.location)

  Synonym:
  mo, show me state
  

  source: wordnet30
• the longest river in the United States; arises in Montana and flows southeastward to become a tributary of the Mississippi at Saint Louis(noun.object)

  Example:
  The Missouri and Mississippi Rivers together form the third longest river in the world.
  

  Synonym:
  missouri river
  

  source: wordnet30
• a member of the Siouan people formerly inhabiting the valley of the Missouri river in Missouri(noun.person)

  source: wordnet30
• a dialect of the Chiwere language spoken by the Missouri(noun.communication)

  source: wordnet30