noun 1.Saint, pope a.d. 106?–115.
2.(Aleksandr Pavlovich), 1777–1825, czar of Russia 1801–25.
3.(Alexander Obrenovich or Aleksandar Obrenović), 1876–1903, king of Serbia 1889–1903.
4.1888–1934, king of Yugoslavia 1921–34 (son of Peter I of Serbia).