externs

1. a person working in but not living in an institution, such as a non-resident doctor or other worker in a hospital.
2. (in a strictly enclosed order of nuns) a sister who does not live exclusively within the enclosure and goes on outside errands.

1. banish (someone considered politically undesirable) from a region or district.

   he was externed for inciting communal tension in the city

mid 16th century (as an adjective in the sense ‘external’): from French externe or Latin externus, from exter ‘outer’. The word was used by Shakespeare to mean ‘outward appearance’; current noun senses date from the early 17th century.