hacker

1. Someone who hacks. · A hacker hacked into his computer account yesterday.
2. One who cuts with heavy or rough blows.
3. One who is inexperienced or unskilled at a particular activity, especially (sports, originally and chiefly golf), a sport such as golf or tennis. · a tennis hacker
4. One who is expert at programming and solving problems with a computer. (dated)
5. One who applies a novel method, shortcut, skill, or trick to something to increase ease, efficiency, or productivity. (dated) · food hacker· growth hacker
6. One who uses a computer to gain unauthorized access to data stored in, or to carry out malicious attacks on, computer networks or computer systems. · a phone hacker
7. Something that hacks; a device or tool for hacking; specifically, an axe used for cutting tree branches or wood.

Plural hackers