Noah Webster's 1828 American Dictionary of the English Language is regarded by many as the finest English
dictionary ever published. The dictionary is available in many forms. I made the content available here for my own purposes,
out of personal admiration for this particular dictionary.
AU'TOCRATOR, n. 1. An absolute prince or sovereign; a ruler or monarch who holds and exercises the powers of government by inherent right, not subject to restriction; a title assumed by the Emperors of Russia. 2. This title was sometimes conferred by the Athenians on their ambassadors and generals, when invested with unlimited powers.
autocrator appears in definitions for these words: