1
: one that hacks
2
: a person who is inexperienced or unskilled at a particular activity
a tennis hacker
3
: an expert at programming and solving problems with a computer
4
: a person who illegally gains access to and sometimes tampers with information in a computer system
Examples of hacker in a Sentence
My friends and I have been playing golf for years, but we're still just a bunch of hackers.
the company's security experts spent days trying to figure out how a hacker could have gotten past the firewall
Recent Examples on the Web
Concerns arose about what would happen to the infrastructure of the internet if hackers, or other people with malicious intent, use the model.
—
Davis Giangiulio, CNBC, 13 Apr. 2026
Investigators say the tool went a step further by capturing session data, allowing hackers to bypass multi-factor authentication and stay logged in even after passwords were changed.
—Cbs News Atlanta Digital Team, CBS News, 13 Apr. 2026
The email suggests the hackers have already exploited customer information.
—Michael Kan, PC Magazine, 13 Apr. 2026
The cutting-edge artificial intelligence business announced last week that its next-generation model, Mythos, has discovered zero-day vulnerabilities — previously unknown software bugs that can be used by hackers to compromise systems — in all major internet browsers and operating systems.
—Editorial Board, Washington Post, 12 Apr. 2026
See All Example Sentences for hacker
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Davis Giangiulio, CNBC, 13 Apr. 2026
Investigators say the tool went a step further by capturing session data, allowing hackers to bypass multi-factor authentication and stay logged in even after passwords were changed.
—Cbs News Atlanta Digital Team, CBS News, 13 Apr. 2026
The email suggests the hackers have already exploited customer information.
—Michael Kan, PC Magazine, 13 Apr. 2026
The cutting-edge artificial intelligence business announced last week that its next-generation model, Mythos, has discovered zero-day vulnerabilities — previously unknown software bugs that can be used by hackers to compromise systems — in all major internet browsers and operating systems.
—Editorial Board, Washington Post, 12 Apr. 2026
See All Example Sentences for hacker
Cite this Entry
“Hacker.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hacker. Accessed 15 Apr. 2026.
Copy CitationKids Definition
hacker
noun
hack·er
ˈhak-ər 
1
: one that hacks
2
: a person who is unskilled at a particular activity
3
: an expert at programming and solving problems with a computer
4
: a person who illegally gains access to a computer system
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