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English definition of “spy”

spy

noun [C] uk   /spaɪ/ us  
B1 a person who secretly collects and reports information about the activities of another country or organizationSpying and espionage

spy

verb uk   /spaɪ/ us  

spy verb (FIND SECRETS)

C1 [I] to secretly collect and report information about the activities of another country or organization: He was arrested for spying on missile sites.Spying and espionage spy out informal to get knowledge secretly, especially of a place: I generally like to spy out restaurants before I go to eat in them.Spying and espionage

spy verb (SEE)

[T] 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
Phrasal verbs
(Definition of spy from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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