Baghatur (Mongolian: ᠪᠠᠭᠠᠲᠦᠷ Baghatur/Ba'atur (Modern Mongolian: Баатар Baatar), Turkish: Bağatur/Batur/Bahadır, Russian: Bogatyr) is a historical Turco-Mongol honorific title, in origin a term for "hero" or "valiant warrior". The Papal envoy Plano Carpini compared the title with the equivalent of European Knighthood.
The etymology of this word is uncertain, although the first syllable is very likely the Iranian title word *bag "god, lord". The term was first used by the steppe peoples to the north and west (Mongolia) of China as early as the 7th century as evidenced in Sui dynasty records. It is attested for the Göktürk Khanate in the 8th century, and among the Bulgars of the First Bulgarian Empire in the 9th century.
The word was common among the Mongols and became especially widespread, as an honorific title, in Genghis Khan's Mongol Empire in the 13th century; the title persisted in its successor-states, and later came to be adopted also as a regnal title in the Ilkhanate, in Timurid dynasties etc.
The word was also introduced into many non-Turkic languages as a result of the Turco-Mongol conquests, and now exists in different forms such as Bulgarian: Багатур (Bagatur), Russian: Богатырь (Bogatyr), Polish (meaning "hero"), Hungarian: Bátor (meaning "brave"), Persian Bahador, Georgian Bagatur, and Hindi Bahadur.