area
noun
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a part of a structure having some specific characteristic or function“the spacious cooking area provided plenty of room for servants”
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the extent of a 2-dimensional surface enclosed within a boundary“the area of a rectangle”expansesurface area
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a part of an animal that has a special function or is supplied by a given artery or nerveregion
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a subject of study“The doctor's area of expertise was in cardiovascular health.”
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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”country
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a particular environment or walk of lifefield