the world > space > [noun] > defined or limited portion of space > a particular extent or region > distinguished by some quality or condition > from which something is excluded (3)
An area from which unwanted animals, etc., are excluded.
During the Second World War (1939–45): an area round the Americas (excluding Canada and the European colonies of the Caribbean) in which military…
an area into which entry is restricted or prohibited, esp. a maritime zone forbidden to enemy ships.