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English definition of “spy on sb/sth”

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spy on sb/sth

verb uk phrasal verb with spy   /spaɪ/ us  
C2 to watch someone or something secretly, often in order to discover information about him, her, or it: He was spying on her through the keyhole.
Translations of “spy on sb/sth”
in Chinese (Traditional) 暗中監視, 窺探…
in Chinese (Simplified) 暗中监视, 窥探…
(Definition of spy on sb/sth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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