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 person who dictates text (e.g. letters to a clerk).
A totalitarian leader of a country, nation, or government.
A tyrannical boss or authority figure.
A governor or ruler of a quarter of a country, especially of a fourth part of a province in or client state of Ancient Rome.
An officer in charge of a fourth part of a phalanx in Ancient Greece.
Each of the four members of a jointly ruling tetrarchy, notably of the Roman Empire since Diocletian.