Empire

The Term Empire might refer to:

Original Dune

 * the Old Empire
 * the Galactic Padishah Empire or Corrino Empire
 * the Atreides Empire

Expanded Dune

 * The Machines’ Empire

Dune Encyclopedia

 * The First Empire
 * the Empire of Ten Worlds
 * the Empire of a Thousand Worlds
 * the Empire of Ten Thousand Worlds