Definitions of hack
(UK: informal) a journalist, especially a print journalist who writes unoriginal or boring articles
At his best, he was a novelist of impressive proportions; at his worst, he was a hack journalist.
a piece of computer code that provides a quick (and often rough or temporary) solution to a particular problem caused by a piece of software or hardware
The hack provides a quick fix for those unable to enter data on certain websites since upgrading their operating system.
an instance of the illegal access of information stored on a computer, phone, or other electronic device
The hack on Wiredata Systems was traced to a nearby school.