noun (n)

• a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)(noun.location)

  Example:
  It was a mountainous area.
  

  Synonym:
  country
  

  source: wordnet30
• a subject of study(noun.cognition)

  Example:
  It was his area of specialization.
  Areas of interest include....
  

  source: wordnet30
• a part of an animal that has a special function or is supplied by a given artery or nerve(noun.body)

  Synonym:
  region
  

  source: wordnet30
• a particular environment or walk of life(noun.state)

  Example:
  It was a closed area of employment.
  

  Synonym:
  arena, domain, field, orbit, sphere
  

  source: wordnet30
• a part of a structure having some specific characteristic or function(noun.artifact)

  Example:
  The spacious cooking area provided plenty of room for servants.
  

  source: wordnet30
• the extent of a 2-dimensional surface enclosed within a boundary(noun.attribute)

  Example:
  The area of a rectangle.
  It was about 500 square feet in area.
  

  Synonym:
  expanse, surface area
  

  source: wordnet30
• Any plane surface, as of the floor of a room or church, or of the ground within an inclosure; an open space in a building.(noun)

  source: webster1913