area

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”

a particular environment or walk of life

• “his social sphere is limited”
• “it was a closed area of employment”
• “he”

a subject of study

• “it was his area of specialization”
• “areas of interest include...”

a part of a structure having some specific characteristic or function

• “the spacious cooking area provided plenty of room for servants”

a part of an animal that has a special function or is supplied by a given artery or nerve

• “in the abdominal region”

the extent of a 2-dimensional surface enclosed within a boundary

• “the area of a rectangle”
• “it was about 500 square feet in area”