noun (n)

• a right reserved exclusively by a particular person or group (especially a hereditary or official right)(noun.attribute)

  Example:
  Suffrage was the prerogative of white adult males.
  

  Synonym:
  exclusive right, perquisite, privilege
  

  source: wordnet30
• An exclusive or peculiar privilege; prior and indefeasible right; fundamental and essential possession; -- used generally of an official and hereditary right which may be asserted without question, and for the exercise of which there is no responsibility or accountability as to the fact and the manner of its exercise.(noun)

  source: webster1913