hacker

The word “hacker” means someone who breaks into computer systems or networks without authorization, often for malicious purposes. In plain terms, someone who works with computer systems at a deep technical level — sometimes to break in illegally, sometimes just as a skilled programmer.

“Hacker” is pronounced ha-kuh (/hækəɹ/ in IPA).

Here is “hacker” used in a sentence: “The bank hired security experts to test its defenses against hackers.”

“Hacker” is a noun.

The word “hacker” comes from Middle English. From Middle English hackere ("one who cuts wood"), from hacken ("to hack, chop") plus the agent suffix -er.

“Hacker” is an uncommon word in modern English.

“Hacker” has 2 distinct senses listed in this dictionary. The most common is: someone who breaks into computer systems or networks without authorization, often for malicious purposes.

In computing circles, "hacker" can refer either to someone who breaks into systems without authorization or to a skilled programmer who enjoys creative problem-solving, while "cracker" is sometimes used specifically for those who break into systems maliciously. The distinction between hacker and cracker is not universally observed, which is why context matters when the word hacker is used.

Not necessarily. While hacker is often used to describe someone who breaks into computer systems without authorization, it also has a positive sense referring to a skilled, enthusiastic programmer who solves technical problems creatively. Which meaning applies usually depends on context, such as whether the discussion involves security breaches or software development.

A white hat hacker uses hacking skills legally and ethically, often to test and improve security, while a black hat hacker breaks into systems without authorization for malicious purposes. Both fall under the broad umbrella of "hacker," but the terms distinguish authorized, ethical activity from unauthorized, harmful activity.