Dominus is a fancy Latin word that means “master” or “lord.” It’s a title that was given to important people in the past. Kinda like when you call someone “Mr.” or “Mrs.”, but even more respectful.
Back in ancient Rome, the title dominus was given to people who had a lot of power and influence. They were usually rich and owned lots of land or businesses. People would call them “Dominus” to show that they respected their authority and looked up to them.
Sometimes, people used the title dominus when talking to their bosses or teachers. They wanted to show that they respected them and would follow their rules.
Today, we don’t really use the title dominus anymore, but it’s still an interesting part of history.