Final answer:
Hacking refers to the act of gaining unauthorized access to a computer system using various methods such as phishing, exploiting software vulnerabilities, and social engineering.
Step-by-step explanation:
Gaining access to a computer system that you have neither permission, nor proper methods, to access is called hacking. Hackers use various techniques to infiltrate systems, including crafting phishing emails to trick individuals into clicking malicious links or sharing sensitive information. They might also exploit software vulnerabilities to gain unauthorized access or use social engineering to deceive people into breaking standard security protocols.