spy on sb/sth
— phrasal verb with spy /spaɪ/ verbDefinition
C2 to watch someone or something secretly, often in order to discover information about them: He was spying on her through the keyhole.Spying and espionage
(Definition of spy on sb/sth from the Cambridge Advanced Learner's Dictionary & Thesaurus
© Cambridge University Press)
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Synonyms and related words:
- agent noun (SPY)
- agent provocateur noun
- counter-espionage noun
- counterintelligence noun
- double agent noun
- MI5 noun
- MI6 noun
- on the inside idiom
- phone tapping noun
- quisling noun
- sleeper noun (SUDDEN ACTIVITY)
- spook noun (PERSON)
- spy noun
- spy verb (FIND SECRETS)
- tail noun (PERSON FOLLOWING)
- tap noun (PHONE)
- tap verb (PHONE)
- the CIA noun
- wired up adjective
- wiretapping noun
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