A tyrannical boss or authority figure.
A person who dictates text (e.g. letters to a clerk).
A totalitarian leader of a country, nation, or government.
A magistrate without colleague in republican Ancient Rome, who held full executive authority for a term granted by the senate (legislature), typically to conduct a war.
A figure of great authority and power.
The greatest minister of a sultan, with absolute power of attorney and, in principle, dismissable only by the sultan himself.