(military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors
[ Syn: undercover agent ]
a secret watcher; someone who secretly watches other people; my spies tell me that you had a good time last night'
spy (n.)
catch sight of
watch, observe, or inquire secretly
catch sight of; to perceive with the eyes; he caught sight of the kings men coming over the ridge
[ Syn: sight ]
secretly collect sensitive or classified information; engage in espionage; spy for the Russians'