magisterial
adjective
of, relating to, or befitting a master; of importance or consequence; authoritative; weighty.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
He quickly drew up the necessary papers, had them signed and sealed, locked them in his desk, and discharged the prisoners in a very unmagisterial manner.
From Her Mother's Secret by Emma Dorothy Eliza Nevitte Southworth