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English definition of “spy”

spy

verb [T] (SEE)    /spaɪ/ old-fashioned or humorous
to see or notice someone or something usually when it involves looking hard: I think I've just spied Andrew in the crowd.Using the eyesEyesight, glasses and lensesThe eye and surrounding areaPerceptive
(Definition of spy verb (SEE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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