spy on
phrasal verb
spied on; spying on; spies on
: to watch (someone) secretly
He spies on his neighbors.
Have you been spying on me?
Examples of spy on in a Sentence
Recent Examples on the Web
The Mark is a spy flick centered on Eden (Alba), an enigmatic spy on a covert and dangerous mission.
—
Matt Grobar, Deadline, 20 Oct. 2025
The same technique could also be exploited to spy on and steal data from a user’s phone.
—PC Magazine, 14 Oct. 2025
The other defendant was handed 10 years in prison for spying on behalf of France, five years in prison on charges of conspiracy to commit a crime against national security, and 17 years of imprisonment for assisting Israeli intelligence services.
—CNN Money, 14 Oct. 2025
There’s now more data about the human cell than ever before, thanks in part to technology that allows scientists to spy on the activities of individual cells.
—Veronique Greenwood, Time, 14 Oct. 2025
See All Example Sentences for spy on
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Matt Grobar, Deadline, 20 Oct. 2025
The same technique could also be exploited to spy on and steal data from a user’s phone.
—PC Magazine, 14 Oct. 2025
The other defendant was handed 10 years in prison for spying on behalf of France, five years in prison on charges of conspiracy to commit a crime against national security, and 17 years of imprisonment for assisting Israeli intelligence services.
—CNN Money, 14 Oct. 2025
There’s now more data about the human cell than ever before, thanks in part to technology that allows scientists to spy on the activities of individual cells.
—Veronique Greenwood, Time, 14 Oct. 2025
See All Example Sentences for spy on
Cite this Entry
“Spy on.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spy%20on. Accessed 24 Oct. 2025.
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