empire

nouns

the domain ruled by an emperor or empress; the region over which imperial dominion is exercised
is derived from
a group of countries under a single authority
"the British created a great empire"
is a type of (narrower)
the organization that is the governing authority of a political unit
"the government reduced taxes"; "the matter was referred to higher authorities"
a monarchy with an emperor as head of state
is derived from
is a type of (narrower)
an autocracy governed by a monarch who usually inherits the authority
a group of diverse companies under common ownership and run as a single organization