- a line bounding or marking off an area: The police created a perimeter with caution tape around the crime scene.
- the outermost limits: Under the new regulations, the smoke-free area for playgrounds and sports areas extends 20 meters from the perimeter of each site.
- Geometry.
- the border or outer boundary of a two-dimensional figure.
- the length of such a boundary.
- a fortified boundary that protects a troop position.
- an instrument for determining the peripheral field of vision.
- Often the perimeter .Basketball.
- a semicircular line on a basketball court surrounding the basket, outside of which field goals are worth three points rather than two.
- the area outside this line (often used attributively): There's no player in the NBA who puts more pressure on opposing defenses from the perimeter than him.The team needs an efficient point guard with a great perimeter shot.
- maths
- the curve or line enclosing a plane area
- the length of this curve or line
- any boundary around something, such as a field
- (as modifier)
- a medical instrument for measuring the limits of the field of vision
