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English definition of “perimeter”

perimeter

noun [C]     /pəˈrɪm.ɪ.tər/ US  /-ˈrɪm.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.Edges and extremities of objectsSurfaces of objects specialized mathematics the length of the outer edge of a shape Edges and extremities of objectsSurfaces of objectsParts of geometrical shapes
(Definition of perimeter noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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