caliphate (Noun) — The era of Islam's ascendancy from the death of Mohammed until the 13th century; some Moslems still maintain that the Moslem world must always have a calif as head of the community. ex. "their goal was to reestablish the Caliphate"
caliphate (Noun) — The territorial jurisdiction of a caliph.
caliphate (Noun) — The office of a caliph.