Overlord (noun)

1. A person who has supreme authority or power.
2. A ruler with complete control over a large group of people or a territory, especially a military commander in charge of occupying forces in a conquered country.
3. A person who dominates or controls others.

Origin:

From middle english overlourd, from old english oferlēod, from ofer ("over") + lēod ("people"). first recorded in the late 13th century.

Examples:

1. During World War II, the Germans had the control over France as the overlord of the occupied territory.
2. He saw himself as the overlord of his company, and he made sure everyone knew it.
3. In medieval England, the king was considered the overlord of all lords in the country.
4. The overlord of the underworld had many soldiers at his disposal.
5. The overlord of the kingdom had absolute power, and all citizens were subject to his rule.