(n.) A king; a chief; the title of the emperor of Russia.

Dalai Lama Holy Roman Emperor Inca Kaiser Simon Legree absolute monarch absolute ruler all-powerful ruler ardri arrogator autarch autocrat bey cacique caesar cham commissar despot dictator disciplinarian driver duce hard master kaid khan martinet mikado negus oligarch oppressor padishah pendragon pharaoh rig sachem sagamore shah sheikh shogun slave driver stickler tenno tycoon tyrant usurper warlord