Pronunciation: (des'put, -pot), [key]
1. a king or other ruler with absolute, unlimited power; autocrat.
2. any tyrant or oppressor.
3. Hist.an honorary title applied to a Byzantine emperor, afterward to members of his family, and later to Byzantine vassal rulers and governors.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.