spy is the dictionary form of spyer Definition of spy
spy has definitions from the field of military
1
[ noun ] (military) a secret agent hired by a state to obtain (military) information about its enemies or by a business to obtain industrial secrets from competitors

Synonyms

undercover_agent

2
[ verb ] catch sight of

Synonyms

spot espy descry

3
[ verb ] watch, observe, or inquire secretly

Synonyms

snoop sleuth stag

4
[ noun ] a secret watcher; someone who secretly watches other people

Examples

"my spies tell me that you had a good time last night"

5
[ verb ] secretly collect sensitive or classified information; engage in espionage

Examples

"spy for the Russians"

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