hackhack1 /hæk/ (also hack into) verb [transitiveT] COMPUTING to secretly reach information on someone else’s computer system so that you can look at, use, or change itThe police are investigating a series of computer crimes involving people thought to have hacked confidential databases.
He didn’t have to hack into my personal computer to get the information.
—hacking noun [uncountableU]Hacking is easy if you know how to do it.