n espionage, secret service
English Collins Dictionary - English synonyms & Thesaurus
spy ( spies plural & 3rd person present) ( spying present participle) ( spied past tense & past participle )
1 n-count A spy is a person whose job is to find out secret information about another country or organization.
He was jailed for five years as an alleged British spy...
2 adj A spy satellite or spy plane obtains secret information about another country by taking photographs from the sky.
3 verb Someone who spiesfor a country or organization tries to find out secret information about another country or organization.
The agent spied for East Germany for more than twenty years... V for n
East and West are still spying on one another... V on n
I never agreed to spy against the United States. V against n
...a ten-year sentence for spying.
4 verb If you spy on someone, you watch them secretly.
That day he spied on her while pretending to work on the shrubs... V on n
5 verb If you spy someone or something, you notice them.
He was walking down the street when he spied an old friend. V n
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