area
noun
a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)
“it was a mountainous area”
“Bible country”
Synonymscountrya subject of study
“it was his area of specialization”
“areas of interest include...”
a part of an animal that has a special function or is supplied by a given artery or nerve
“in the abdominal region”
Synonymsregiona particular environment or walk of life
“his social sphere is limited”
“it was a closed area of employment”
a part of a structure having some specific characteristic or function
“the spacious cooking area provided plenty of room for servants”
the extent of a 2-dimensional surface enclosed within a boundary
“the area of a rectangle”
“it was about 500 square feet in area”
Source: WordNet 3.1, Princeton University