Prut or Pruth (both: prōt) [key], river, c.530 mi (850 km) long, rising in the Carpathian Mts., W Ukraine, and flowing generally SE to the Danube River at Reni. It forms the border between Romania and Moldova. The Prut is navigable to Leovo. By the Peace of the Pruth (1711) Peter I of Russia restored Azov to the Turks (see Russo-Turkish Wars).
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