Meaning of “hacker” in the English Dictionary

british dictionary

"hacker" in British English

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hackernoun [ C ]

uk /ˈhæk.ər/ us /ˈhæk.ɚ/

also computer hacker someone who hacks into other people's computer systems

also phone hacker someone who hacks into another person's phone and listens to their messages

(Definition of “hacker” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"hacker" in American English

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hackernoun [ C ]

us /ˈhæk·ər/

a person who is skilled in the use of computer systems, often one who illegally obtains access to private computer systems:

(Definition of “hacker” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"hacker" in Business English

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hackernoun [ C ]

uk /ˈhækər/ us IT

someone who illegally uses a computer to access information stored on another computer system or to spread a computer virus:

The software company said that more than 30,000 computers were hijacked by hackers each day and used to illegally send out spam.
Installing a firewall is one method of trying to protect against hackers.
Hacker attacks, financial fraud, and data theft are now everyday concerns.
a computer/internet hacker

(Definition of “hacker” from the Cambridge Business English Dictionary © Cambridge University Press)

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