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English definition of “mirror”

mirror

noun [C]     /ˈmɪrər/
A2 a piece of glass with a shiny metallic material on one side that produces an image of anything that is in front of it: a bathroom mirror He looked at his reflection in the mirror. → See also rear-view mirror, wing mirrorGlass
(Definition of mirror noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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