hackers

4 definitions • 10 examples

someone who gets into other people's computer systems without permission in order to find out information or to do something illegal :

Problems can occur when a company does not know a hacker has broken into its system.

"Bots" can even allow hackers to take over systems.

someone who uses another person's phone system without permission, especially to listen to their spoken messages:

When her voicemail inbox became full, hackers reportedly deleted messages to make room for new ones.

There are also suggestions that hackers could make expensive phone calls at the owner's expense.

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

Hackers are a major defense department concern.

someone who uses a computer to access information stored on another computer system without permission, 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

a criminal/malicious hacker