a native or naturalized member of a state or nation who owes allegiance to its government and is entitled to its protection (distinguished from alien).
2.
an inhabitant of a city or town, especially one entitled to its privileges or franchises.
3.
an inhabitant, or denizen: The deer is a citizen of our woods.
4.
a civilian, as distinguished from a soldier, police officer, etc.
Origin: 1275–1325; Middle English citisein < Anglo-French citesein,Old French citeain, equivalent to citecity + -ain-an; Anglo-French s perhaps by association with deinzaindenizen