/ prɪˈrɒgətɪv; NAmE -ˈrɑːg-/ noun
( formal ) a right or advantage belonging to a particular person or group because of their importance or social position :
In many countries education is still the prerogative of the rich.
the royal prerogative (= the special rights of a king or queen)
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WORD ORIGIN
late Middle English : via Old French from Latin praerogativa (the verdict of) the political division which was chosen to vote first in the assembly, feminine (used as noun) of praerogativus asked first, from prae before + rogare ask.