A political unit, typically having an extensive territory or comprising a number of territories or nations (especially one comprising one or more kingdoms) and ruled by a single supreme authority.
the Russian empire
A political unit ruled by an emperor or empress.
The Empire of Vietnam was a short-lived client state of Japan governing Vietnam between March 11 and August 23, 1945.
A group of states or other territories that owe allegiance to a foreign power.
An expansive and powerful enterprise under the control of one person or group.
the McDonald's fast food empire
(Absolute) control, dominion, sway.