contour; outline; summary; outline; looks; features
district; quarter; enclosure; area enclosed by earthwork; red-light district
fortress; castle; citadel; enclosure; castle walls
(licensed) red light district
outer wall (e.g. castle); outer block (enclosure); outline; contour
fortified city; walled city
outline; contour line; border line
purification; cleaning up; purging
auxiliary organization (organisation); extra-departmental body; fringe organization
thoracic outlet syndrome; TOS
outer ring road; orbital road
walled settlement; walled town