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English definition of “arch”

arch

noun [C] (SHAPE)    /ɑːtʃ/ US  /ɑːrtʃ/
something that has the shape of an arch, often used for decoration: The boat floated through the arch of the trees towards the bridge.Geometrical shapesSpherical, circular and annular objects
(Definition of arch noun (SHAPE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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