- a state in the central United States. 69,674 sq. mi. (180,455 sq. km). Capital: Jefferson City. Abbreviations: MO (for use with zip code), Mo.
- a river flowing from SW Montana into the Mississippi N of St. Louis, Mo. 2,723 miles (4,382 km) long.
- a member of a North American Indian tribe belonging to the Siouan linguistic stock, located on the Missouri River in early historic times and now extinct as a tribe.
- unwilling to accept something without proof; skeptical: I'm from Missouri—you'll have to show me that you're right.
- a state of the central US: consists of rolling prairies in the north, the Ozark Mountains in the south, and part of the Mississippi flood plain in the southeast, with the Mississippi forming the E border; chief US producer of lead and barytes. Capital: Jefferson City. Pop: 5 704 484 (2003 est). Area: 178 699 sq km (68 995 sq miles)
- a river in the W and central US, rising in SW Montana: flows north, east, and southeast to join the Mississippi above St Louis; the longest river in North America; chief tributary of the Mississippi. Length: 3970 km (2466 miles)
