Hey kiddo! Have you ever heard the word "nobility"? It means a group of people who are very important and powerful. In Ireland, there used to be a group of people who were called the "Irish nobility". They were the most important and powerful people in Ireland a long time ago.
But who were these people? They were basically like kings and queens! They were born into families who were really rich and powerful. They didn't have to work for their money, they inherited it from their family. These families were called "clans" and they had lots of land and lots of people who worked for them.
The Irish nobility would be in charge of their land and the people who lived on it. They would make decisions about how everything worked and they would have lots of servants and soldiers to help them. They would also have fancy clothes and big houses to show everybody how important they were.
But eventually, things started to change. Ireland became part of a bigger country called England, and the English took over a lot of the power. The Irish nobility lost a lot of their land and their power, and many of them left Ireland to live somewhere else.
Today, there aren't really any Irish nobility left. Some families might still have a lot of money and power, but they don't have the same kind of status and importance that the Irish nobility used to have a long time ago.
So, that's what Irish nobility means, kiddo! It's like being a really important and powerful king or queen in Ireland a long time ago.