1. one of two magistrates or officials who jointly hold the same office
Usage: historical; Roman government

Examples

• The duumvir shared administrative duties with his colleague in governing the Roman colony.
• Each duumvir had equal authority in municipal affairs.
• The two duumvirs were elected annually to oversee local government.
• As a duumvir, he was responsible for judicial and executive functions.
• The office of duumvir was common in Roman provincial towns.
• Historical records show that the duumvir often presided over public works projects.