1 a member of a State or Commonwealth, either native or naturalized (British citizen).
2 (usu. foll. by of) a an inhabitant of a city. b a freeman of a city.
3 US a civilian.
Phrases and idioms:
citizen of the world a person who is at home anywhere; a cosmopolitan. Citizens' Advice Bureau (in the UK) an office at which the public can receive free advice and information on civil matters. citizen's arrest an arrest by an ordinary person without a warrant, allowable in certain cases. citizen's band a system of local intercommunication by individuals on special radio frequencies.
Derivatives:
citizenhood n. citizenry n. citizenship n.
Etymology: ME f. AF citesein, OF citeain ult. f. L civitas -tatis city: cf. DENIZEN
Useful english dictionary. 2012.