Rule Over Meaning

(transitive, idiomatic) to be a ruler of, to command.

Example: 1900, L. Frank Baum , The Wonderful Wizard of Oz Chapter 23
  He leaned on his axe and thought a moment. Then he said, "The Winkies were very kind to me, and wanted me to rule over them after the Wicked Witch died. I am fond of the Winkies, and if I could get back again to the Country of the West, I should like nothing better than to rule over them forever."