Old English; earliest use found in Beowulf. Compare Old Saxon weroldkuning, Old High German weroltkuning (Middle High German werltkünec); compare also heaven king.
Definition of world king in US English:
world king
noun
1An earthly king.
2A universal ruler, a king of the whole world.
Origin
Old English; earliest use found in Beowulf. Compare Old Saxon weroldkuning, Old High German weroltkuning (Middle High German werltkünec); compare also heaven king.