An empire is defined as "an aggregate of nations or people ruled over by an emperor or other powerful sovereign or government, usually a territory of greater extent than a kingdom, as the former British Empire, French Empire, Spanish Empire, Russian Empire, Byzantine Empire or Roman Empire." An empire can be made solely of contiguous territories such as the Austro-Hungarian Empire, or of territories far remote from the homeland, such as a colonial empire.

An empire is a group of states or peoples under centralized rule.

Empire! is a space combat and trading video game designed by Andrew Glaister and published by Firebird Software in 1986 for the ZX Spectrum, Commodore 64 and Amstrad CPC.