A sovereign's right to do wrong.
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.
special exclusive powers, as for example, the powers that are vested only in the presidency and not in the legislature. The exclusive powers of a monarch are referred to as the royal prerogative.
a right reserved exclusively by a particular person or group (especially a hereditary or official right); "suffrage was the prerogative of white adult males"
The exclusive right and power to command, decide, rule, or judge.
The residual, but often very important, powers of the sovereign, most of which are, in practice, exercised by Ministers on behalf of Her Majesty. Within the area of devolved competence, such powers are exercisable by Scottish Ministers (section 53, Scotland Act).
A Prerogative is an exclusive legal right given from a government or state and invested in an individual or group, the content of which is separate from the body of rights enjoyed under the general law of the normative state. It was a common facet of Feudal law.