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English definition of “lens”

lens

noun [C] (GLASS)    /lenz/
a curved piece of glass, plastic, or other transparent material, used in cameras, glasses, and scientific equipment, that makes objects seem closer, larger, smaller, etc.: a camera with a zoom lensOptics, microscopy and lasersEyesight, glasses and lensesEyesight, glasses and lensesUsing the eyesThe eye and surrounding areaOptics, microscopy and lasers → contact lensEyesight, glasses and lensesUsing the eyesThe eye and surrounding areaOptics, microscopy and lasers
(Definition of lens noun (GLASS) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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