Strong’s Greek
G2888 — kosmokrator
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
κοσμοκράτωρ
kosmokrator — pronounced kos-mok-rat'-ore
from 2889 and 2902; a world-ruler, an epithet of Satan:--ruler. see GREEK for 2889 see GREEK for 2902
1 occurrence in the KJV.
Ephesians 6:12
For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.