Definitions for overlordˈoʊ vərˌlɔrd
Random House Webster's College Dictionary
a person who is lord over other lords.
a person of great influence or power.
(v.t.)to rule tyrannically.
Origin of overlord:
overlord, master, lord(noun)
a person who has general authority over others
A ruler of other rulers.
The various tribal chieftains met each spring to elect an overlord that would lead them in time of war.
Anyone with overarching power or authority in a given domain.
The crusty old professor was overlord of the history department, and few dared to cross his will.
Origin: over- + lord