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 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.
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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
The attack can bypass security safeguards in Edge, allowing a hacker to install malware, spy on the victim’s network, and steal data.
—PC Magazine, 13 Oct. 2025
When notable figures like Malcolm X and Elijah Muhammad visited Milwaukee in the 1940s, the FBI sent agents to spy on Nation of Islam members, according to Benson.
—Everett Eaton, jsonline.com, 7 Oct. 2025
See All Example Sentences for spy on
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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
The attack can bypass security safeguards in Edge, allowing a hacker to install malware, spy on the victim’s network, and steal data.
—PC Magazine, 13 Oct. 2025
When notable figures like Malcolm X and Elijah Muhammad visited Milwaukee in the 1940s, the FBI sent agents to spy on Nation of Islam members, according to Benson.
—Everett Eaton, jsonline.com, 7 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 21 Oct. 2025.
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