Intrusion is like having a sneaky raccoon rummaging through your digital garbage can. In cyber-security lingo, it’s when someone – usually a no-good hacker – tries to break into your computer systems, networks, or devices without permission. These digital raccoons are after your valuable data, like top-secret cookie recipes or classified emails. But fear not! There are virtual security guards, called intrusion detection systems, ready to chase these critters away before they cause any real mess. So, remember: an intrusion is an unwanted digital visitor that we all want to keep at bay! Let’s keep our cyber homes clean and protected, folks!