magisterial

adj

1. Befitting the status or skill of a magister or master; authoritative, masterly.

   “The economist and demographer David Lam, in his magisterial 2011 presidential address to the Population Association of America, identified the keys to global prosperity in the face of record rates of population growth.”

2. Of or pertaining to a master, magistrate, the magisterium, or one in authority.

   “Instead a ‘magisterial’ Reformation was created: these were the Protestant movements led by the magistri, the theologically educated masters, and magistrates of all descriptions – kings, princes, city councils.”

3. Pertaining to, produced by, or of the nature of, magistery.