a person who is not on active duty with a military, naval, police, or fire fighting organization.
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.
a person versed in or studying Roman or civil law.
of, pertaining to, formed by, or administered by civilians.
Origin: 1350–1400;Middle English: student of civil law < Old Frenchcivilien (adj.); see civil, -ian
1388, from O.Fr. civilien "of the civil law," created from L. civilis (see civil). Original meaning in Eng. was "judge or authority on civil law," sense of "non-military person" is first attested 1829.