Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “hacker”

hacker

noun [C]     /ˈhæk.ər/ US  //
(also computer hacker) someone who hacks into other people's computer systemsOperating computersMiscellaneous criminals (also phone hacker) someone who hacks into another person's phone and listens to their messages
(Definition of hacker noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of hacker

Definitions of “hacker” in other dictionaries

Word of the Day

neighbourly

friendly or helpful

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More