Region (4)
'region' is the definition.
(I know that area is a type of region)
This is the entire clue.
(Other definitions for area that I've seen before include "land" , "Patch" , "field of study" , "Locality" , "Space occupied by something" .)
'region' is the definition.
(I know that zone is a type of geographic area)
This is the entire clue.
(Other definitions for zone that I've seen before include "A defined area as for particular purpose" , "Bitter, pungent" , "Area subject to restrictions, parking say" , "Area; belt" , "Area, division" .)
'region' is the definition.
(I know that district is a type of region)
This is all the clue.
(Other definitions for district that I've seen before include "Territorial division" , "Region marked off for administrative or other purposes" , "Area, region" , "'Area, territory (8)'" , "A quarter" .)