/ ˈdɪnəsti; NAmE ˈdaɪ-/ noun ( pl. -ies )
1.
a series of rulers of a country who all belong to the same family :
the Nehru-Gandhi dynasty
2.
a period of years during which members of a particular family rule a country
► dyn·as·tic / dɪˈnæstɪk; NAmE daɪ-/ adjective [ usually before noun ]:
dynastic history
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WORD ORIGIN
late Middle English : from French dynastie , or via late Latin from Greek dunasteia lordship, power, from dunastēs , from dunasthai be able.