Definition of "Area" :

noun: a part of a structure having some specific characteristic or function

"The spacious cooking area provided plenty of room for servants."

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

"The area of a rectangle."

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

noun: a subject of study

"It was his area of specialization."

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."

noun: a particular environment or walk of life

"It was a closed area of employment."