Emily Dickinson Lexicon

DY'NAS-TY, n. [Gr. δυναζεια, power, sovereignty, from δυναςης, a lord or chief, from δυναμαι, to be able or strong, to prevail; Ir. tanaiste. The W. dyn, man, is probably from the same root. Class Dn.]

Government; sovereignty; or rather a race or succession of kings of the same line or family, who govern a particular country; as, the dynasties of Egypt or Persia. – Encyc. The obligation of treaties and contracts is allowed to survive the change of dynasties. – E. Everett.