1. a sequence of powerful leaders in the same family;
The Collaborative International Dictionary of English v.0.48:
Dynasty \Dy"nas*ty\ (d[imac]"nas*t[y^] or d[i^]n"as*t[y^]; 277),
n.; pl. Dynasties (-t[i^]z). [Gr. dynastei`a lordship, fr.
dynastey`ein to hold power or lordship, fr. dyna`sths: cf. F.
dynastie dynasty. See Dynast.]
1. Sovereignty; lordship; dominion. --Johnson.
2. A race or succession of kings, of the same line or family;
the continued lordship of a race of rulers.
WordNet (r) 3.0 (2006):
n 1: a sequence of powerful leaders in the same family
Bouvier's Law Dictionary, Revised 6th Ed (1856):
DYNASTY. A succession of kings in the same line or family; government;