Definition of citizen king in US English:

citizen king

noun

  • 1(Originally in the context of the French Revolution) a king who seeks to serve, or who is concerned with, the interests of the people; a king resembling an ordinary citizen; (later also) a popular name for Louis Philippe of France (1773–1850).

  • 2A citizen having great political or military power.

Origin

Late 18th century; earliest use found in The London Chronicle.