1. Used to express that you have caught or trapped someone, or that you understand something clever or tricky.
Usage: informal; often used in games or playful contexts
2. Used to acknowledge that you understand or agree with what someone has said.
Usage: informal; conversational

1. A trick, trap, or unexpected catch; a situation designed to deceive or surprise someone.
Usage: informal

Examples

• Gotcha! I knew you were hiding behind the door.
• You're saying we need to finish by Friday—gotcha, I'll make sure it's done.
• The test had a gotcha question that confused most students.
• Gotcha—I understand what you mean now.
• He tried to pull a gotcha on me, but I saw it coming.
• The fine print was a gotcha that nobody noticed until later.