perimeter

noun
UK /pəˈrɪm.ɪ.tər/
US /pəˈrɪm.ə.t̬ɚ/

The perimeter is the line around the outside of a shape.

We walked around the perimeter of the playground.

SYNONYMS

boundaryborderedgeoutlinecircumference

RELATED WORDS

areafenceboundary linemargincircuit

OTHER MEANINGS

2. The total length of the outside edge of a shape.

The perimeter of the square is twelve centimeters.

3. The outer limits of an area, especially one guarded by security.

Guards patrol the perimeter of the base.

4. The edge of a playing field or court.

The ball bounced off the perimeter and back into play.