prime minister n1 : the chief minister of a ruler or state
2 : the official head of a cabinet or ministry
: the chief executive of a parliamentary government
prime min·is·te·ri·al [-mi-nə-stir-ē-əl]
prime min·is·ter·ship n
prime min·is·try [-mi-nə-strē]
Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.