Compare: «Tyrant». Encyclopedia of Diderot & d'Alembert – Collaborative Translation Project, 06-11-2009 [Consulta: 1r abril 2015]. «[...] today by tyrant one understands, not only a usurper of sovereign power, but even a legitimate sovereign who abuses his power in order to violate the law, to oppress his people, and to make his subjects the victims of his passions and unjust desires, which he substitutes for laws.»
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«Tyrant». A: Hugh Chisholm. Encyclopædia Britannica (en anglès). 27. 11a ed. Cambridge University Press, 1911.: "TYRANT (Gr. τύραννος, master, ruler), a term applied in modern times to a ruler of a cruel and oppressive character."