imperium

n. supreme power; domain of control; right to enforce the law

Imperium in a broad sense translates as power. In ancient Rome the concept applied to people, and meant something like "power status" or "authority", or could be used with a geographical connotation and meant something like "territory". It is not to be mistaken with auctoritas ("authority").
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n. empire, group of countries ruled over by an emperor or other sovereign

n. empire

Absolute power