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English definition of “perimeter”

perimeter

noun [C]  /pəˈrɪm·ɪ·t̬ər/ us  
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)
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