n.
1.the power or right to give orders or make decisions
2.(usually plural) persons who exercise (administrative) control over others
3.an expert whose views are taken as definitive
4.freedom from doubt
5.an administrative unit of government
6.official permission or approval
7.an authoritative written work
Idiom of the Day
ring down the curtain on (something)
to bring something to an end
The famous singer rang down the curtain on an evening of wonderful music.