monocrat

from The Collaborative International Dictionary of English v.0.48
Monocrat \Mon"o*crat\, n. [Cf. Gr. ? ruling alone.]
   One who governs alone.
   [1913 Webster]
    
from Bouvier's Law Dictionary, Revised 6th Ed (1856)
MONOCRAT. A monarch who governs alone; an absolute governor.
    

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