tetrarchy UK /ˈtɛtɹɑːki/US /ˈtɛtɹɑɹki/ noun2 •A government where power is shared by four people, especially (historical) the Herodian tetrarchy established in Judea after the death of Herod and the Tetrarchy of Diocletian which ruled the Roman Empire in the years 293-313.Constantius was not born to the purple and Maximianus was the only original member of the First Tetrarchy from whom Constantine could satisfactorily derive his rule. — 1996 •The land ruled by such a government, either together or separately.According to Josephus, Herod Agrippa, who succeeded Antipas in his Tetrarchy, died in the seventh year of his reign;[…]. — 1830 formstetrarchies
