What is the meaning of area?

noun

• A particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography. )
  • usage: "it was a mountainous area"; "Bible country"
  • synonyms: country
• A subject of study.
  • usage: "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.
  • usage: "in the abdominal region"
  • synonyms: region
• A particular environment or walk of life.
  • usage: "his social sphere is limited"; "it was a closed area of employment"; "he's out of my orbit"
  • synonyms: sphere, domain, orbit, field, arena
• A part of a structure having some specific characteristic or function.
  • usage: "the spacious cooking area provided plenty of room for servants"
• The extent of a 2-dimensional surface enclosed within a boundary.
  • usage: "the area of a rectangle"; "it was about 500 square feet in area"
  • synonyms: expanse, surface area