aristocracy
n
1 [CGp] highest social class; the nobility 贵族阶级; 贵族
members of the aristocracy 贵族成员.
2
(a) [U] government by people of the highest social class 贵族政府; 贵族统治.
(b) [C] country or state with such a government 贵族统治的国家或政体.
3 [C] most able or gifted members of any class (任何阶级或阶层的)最优秀的人物
an aristocracy of talent 人杰.