dyn ‧ a ‧ sty /ˈdɪnəsti $ ˈdaɪ-/ BrE AmE noun ( plural dynasties ) [countable]
[ Date: 1300-1400 ; Language: Late Latin ; Origin: dynastia , from Greek dynastes 'lord' ]
1 . a family of kings or other rulers whose parents, grandparents etc have ruled the country for many years:
The Habsburg dynasty ruled in Austria from 1278 to 1918.
2 . a period of time when a particular family ruled a country or area
3 . informal a group or family that controls a particular business or organization for a long time:
the Rothschild banking dynasty