Meaning of “perimeter” in the English Dictionary

american-english dictionary

"perimeter" in British English

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perimeternoun [ C ]

uk /pəˈrɪm.ɪ.tər/ us /pəˈrɪm.ə.t̬ɚ/

the outer edge of an area of land or the border around it:

Protesters cut a hole in the perimeter fence.
A river runs along one side of the field's perimeter.

specialized mathematics the length of the outer edge of a shape

(Definition of “perimeter” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"perimeter" in American English

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perimeternoun [ C ]

us /pəˈrɪm·ɪ·t̬ər/

the outer edge of an area or the border around it:

Several bombs landed near the perimeter of the airport.

geometry The perimeter is the outer edge of a flat shape or area.

geometry Perimeter is also the distance around the outer edge of a flat shape.

(Definition of “perimeter” from the Cambridge Academic Content Dictionary © Cambridge University Press)