aristocracy - definition and synonyms

noun [countable] 

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/ˌærɪˈstɒkrəsi/
singulararistocracy
pluralaristocracies
  1. the people in the highest class of society, who usually have money, land, and power and who often have special titles, such as ‘duke’ or ‘countess: can be followed by a singular or plural verb
    the aristocracy:

    She married into the aristocracy.