(n): an indefinite period (usually marked by specific attributes or activities)
(n): a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel
(n): any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
(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
(n): one of the 50 states of the United States