<p><strong>Noun</strong></p><ul><li>a person who is not on active duty with a military, naval, police, or fire fighting organization.</li><li>Informal. anyone regarded by members of a profession, interest group, society, etc., as not belonging; nonprofessional; outsider: We need a producer to run the movie studio, not some civilian from the business world.</li><li>a person versed in or studying Roman or civil law.</li></ul><p><strong>Adjective</strong></p><ul><li>of, pertaining to, formed by, or administered by civilians.</li></ul>