ಅರ್ಥ : (military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors.
ಸಮಾನಾರ್ಥಕ : undercover agent
ಅರ್ಥ : A secret watcher. Someone who secretly watches other people.
ಉದಾಹರಣೆ :
My spies tell me that you had a good time last night.