English dictionary

spy

/sp/aI/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

(military) a secret agent hired by a state to obtain information about its enemies or by a business to obtain industrial secrets from competitors

noun.person

Synonyms undercover agent

Source: WordNet 3.0
a secret watcher; someone who secretly watches other people

noun.person

Source: WordNet 3.0
One who keeps a constant watch of the conduct of others.

noun

Source: webster1913

catch sight of

verb.perception

Synonyms descry espy spot

Source: WordNet 3.0
watch, observe, or inquire secretly

verb.communication

Synonyms sleuth snoop stag

Source: WordNet 3.0
catch sight of; to perceive with the eyes

verb.perception

Synonyms sight

Source: WordNet 3.0
secretly collect sensitive or classified information; engage in espionage

verb.communication

Examples
Spy for the Russians.

Source: WordNet 3.0
To gain sight of; to discover at a distance, or in a state of concealment; to espy; to see.

verb

Source: webster1913
To search narrowly; to scrutinize.

verb

Source: webster1913