Definitions of spy
n (military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors
- undercover agent
Margarete Gertrud Zelle
Dutch dancer who was executed by the French as a German spy in World War I (1876-1917)
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a spy who works against enemy espionage
a spy who works for two mutually antagonistic countries
someone employed to spy on another country or business competitor
a spy for a foreign country
someone who takes up a position surreptitiously for the purpose of espionage
a spy or saboteur or terrorist planted in an enemy country who lives there as a law-abiding citizen until activated by a prearranged signal
n a secret watcher; someone who secretly watches other people
“my spies tell me that you had a good time last night”
a spy who makes uninvited inquiries into the private affairs of others
shadow, shadower, tail
a spy employed to follow someone and report their movements
a secret listener to private conversations
v catch sight of; to perceive with the eyes
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descry, espy, spot
catch sight of
detect, discover, find, notice, observe
discover or determine the existence, presence, or fact of
catch out, find out
trap; especially in an error or in a reprehensible act
detect some circumstance or entity automatically
find an instance of (a word or particular usage of a word)
discover traces of
observe as if with an eye