of, pertaining to, or befitting a master; authoritative; weighty; of importance or consequence: a magisterial pronouncement by the director of the board.
2.
imperious; domineering: a magisterial tone of command.
3.
of or befitting a magistrate or the office of a magistrate: The judge spoke with magisterial gravity.
4.
of the rank of a magistrate: magisterial standing.
Origin: 1625–35; < Late Latinmagisteriālis; see magisterium, -al1
1630s, from L. magisterialis "of or pertaining to the office of magistrate, director, or teacher," from magisterius "having authority of a magistrate," from magister "chief, director" (see master).