Khan is a fancy word that means leader or ruler in certain cultures, like in Central Asia or Mongolia. It's kind of like being a king, but in specific places and times. A khan would usually lead a group of people called a tribe or a clan. They would make decisions for the people in the tribe and tell them what to do. Sometimes, different khanates would fight each other to be the leader of even more people. But overall, being a khan was a very important and respected job in these places.