An "area" refers to a specific space or region that can be measured or defined. It is often used in mathematics to describe the size of a two-dimensional surface, such as a rectangle or circle. The area is calculated using various formulas, depending on the shape, and is typically expressed in square units, like square meters or square feet. In geography, an area can denote a particular location or zone, such as a city, country, or natural habitat. For example, the Amazon Rainforest is a vast area known for its biodiversity, while New York City is a densely populated urban area with distinct neighborhoods.