'Imperium' definitions:

Definition of 'imperium'

(from WordNet)
noun
The domain ruled by an emperor or empress; the region over which imperial dominion is exercised [syn: empire, imperium]
noun
Supreme authority; absolute dominion

Definition of 'Imperium'

From: GCIDE
  • Imperium \Im*pe"ri*um\, n.; pl. Imperia. [L. See Empire.]
  • 1. Supreme power; absolute dominion; empire. [Webster 1913 Suppl.]
  • 2. (Law) The right to command, which includes the right to employ the force of the state to enforce the laws. It is one of the principal attributes of the executive power. [Webster 1913 Suppl.]