empire

(noun) the domain ruled by an emperor or empress; the region over which imperial dominion is exercised. Synonyms: imperium.

(noun) a group of countries under a single authority. Example: "The british created a great empire."

(noun) a monarchy with an emperor as head of state.

(noun) a group of diverse companies under common ownership and run as a single organization. Synonyms: conglomerate.

(noun) an eating apple that somewhat resembles a McIntosh; used as both an eating and a cooking apple. Synonyms: Empire.