Meaning of “spy” in the English Dictionary

"spy" in British English

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spynoun [ C ]

uk /spaɪ/ us /spaɪ/

spyverb

uk /spaɪ/ us /spaɪ/

(Definition of “spy” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"spy" in American English

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spynoun [ C ]

us /spɑɪ/ slang spook

spy noun [ C ] (PERSON)

spyverb

us /spɑɪ/

spy verb (SEE)

[ T ] to see or notice someone or something:

He kept on their trail until he spied firelight from a camp nestled in the rocks.

spy verb (GATHER INFORMATION)

[ I ] to secretly gather and report information about another country or organization:

Bazoft confessed on television that he spied for Israel.

(Definition of “spy” from the Cambridge Academic Content Dictionary © Cambridge University Press)