What is the meaning of Civilian?

A person following the pursuits of civil life, especially one who is not an active member of the armed forces.

A person who does not belong to a particular group or engage in a particular activity, an outsider.

One skilled in civil law.

A student of civil law at a university or college.

An employee of the civil service.

Not related to the military, police or other governmental professions.

Source: wiktionary.org