1. n. a taxi driver. You wonder how some of these hackers keep their licenses.
2. n. a sloppy or inefficient computer programmer. This program was written by a real hacker. It’s a mess, but it works.
3. n. a generally unsuccessful person. Poor Pete is just a hacker. He’ll never go any place.
4. n. someone who breaks into a computer electronically. Some hacker broke into our computer!