monocracyPronunciation: /məˈnɒkrəsi/Definition of monocracy noun (plural monocracies) [mass noun] a system of government by one person only. Derivatives monocratPronunciation: /-ˈkrat/ noun monocraticPronunciation: /-ˈkratɪk/ adjective monocracy in other Oxford dictionaries Definition of monocracy in the US English dictionary