a king or other ruler with absolute, unlimited power; autocrat.
2.
any tyrant or oppressor.
3.
History/Historical. an honorary title applied to a Byzantine emperor, afterward to members of his family, and later to Byzantine vassal rulers and governors.
Origin: 1555–65; < Greek despótēs master < *dems-pot- presumably, “master of the house,” equivalent to *dems-, akin to dómos house + pot-, base of pósis husband, spouse; compare hospodar, host1
1560s, "absolute ruler," from M.L. despota, from Gk. despotes "master of a household, lord, absolute ruler." Faintly pejorative in Gk., progressively more so as used in various languages for Roman emperors, Christian rulers of Ottoman provinces, and Louis XVI during the French Revolution.