spy

IPA: spˈaɪ

A person who secretly watches and examines the actions of other individuals or organizations and gathers information on them (usually to gain an advantage).
(American football) A defensive player assigned to cover an offensive backfield player man-to-man when they are expected to engage in a running play, but the offensive player does not run with the ball immediately.

(intransitive) To act as a spy.
(transitive) To spot; to catch sight of.
(intransitive) To search narrowly; to scrutinize.
(transitive) To explore; to see; to view; inspect and examine secretly, as a country.

Examples of "spy" in Sentences

And he is listening to what we call the spy in the sky.
They had precision cameras, binoculars, they had what we call spy-type equipment.
How could a tiny start-up help manage the government's main spy satellite program?
Some of his work might justify the word "spy" in Shulman's subtitle, though "assassin" is surely over-egging it.
I have kept a guard, what you call a spy, about your house to see if the vile Storms would enter when you were not there to repel him.
And -- went on the cool, quiet mind -- since the man was _not_ a spy how could a Union officer be executed for assisting a _spy_ to escape?
Just as it looks like the spy is about to complete his mission and escape, he is gunned down by Major John Casey, an NSA agent who has encountered him before.
The term spy ware refers to software programs made by unscrupulous marketing companies that allow them to snoop on your browsing activity, see what you purchase, and cause pop-up ads to appear on your computer.