The perimeter is the distance around a given two-dimensional object.
Perimeter may also refer to:
Perimeter Aviation, an airline Perimeter fence, the demarcation of a perimeter, when the protection of assets, personnel or buildings is required Perimeter Institute for Theoretical Physics, an independent research centre in foundational theoretical physics
Places Interstate 285 (Georgia) ("The Perimeter"), an Interstate Highway loop encircling Atlanta, Georgia Perimeter Center, a major edge city in metro Atlanta, Georgia, United States Perimeter Mall, an upscale shopping mall in Dunwoody, Georgia
Technology Dead Hand (also ), a Cold War-era automatic nuclear weapons-control system used by the Soviet Union Perimeter (video game), a real-time strategy video game developed by Russian studio K-D Lab for Microsoft Windows Visual field test (also perimeter), an eye examination that can detect dysfunction in central and peripheral vision
See also Perimeter Highway (disambiguation)