greenbelt

This term is primarily used in urban planning and environmental policy to describe a strategic land-use zone. It carries a strong connotation of preservation and restriction, often serving as a point of contention between environmentalists who wish to prevent urban sprawl and developers seeking to expand housing.

In British English, the term is frequently used in the context of official government legislation and zoning laws. While it refers to a physical area of land, it functions as a legal designation, meaning the "belt" is defined more by what is forbidden (construction) than by what is present (nature).