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English definition of “quadrilateral”


noun [C]     /ˌkwɒd.rɪˈlæt.ər.əl/ US  /ˌkwɑː.drɪˈlæt̬-/ specialized
a flat shape with four straight sides : Squares and rectangles are quadrilaterals.Geometrical shapesSpherical, circular and annular objects
(Definition of quadrilateral noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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