1. a person who uses computers to gain unauthorized access to data or systems
2. a skilled computer programmer or enthusiast who enjoys exploring and modifying computer systems
Usage: computing
3. a person who plays golf poorly or clumsily
Usage: informal; golf

Examples

• The company’s database was compromised by a hacker.
• Security experts work to protect systems from hackers.
• She’s a talented hacker who can solve any coding problem.
• The programming conference attracted hackers from around the world.
• He’s just a weekend hacker on the golf course.
• Even hackers can improve their game with practice.