What is hacking?

In my words hacking is the unauthorized use of a computer and its network without knowing the user of the device that we are accessing it virtually.
Now a days computers had become more usable and a computer can do many things like cloud computing, cloud gaming, accessing internet, etc. The computer has given us a lot of things like coding, hacking,etc.

 There are many types of hacking like Brute Force Attack, Zero-Day Vulnerability, Spear-Fishing,etc.