Definition of magisterial adjective from the Oxford Advanced American Dictionary

     

    magisterial

     adjective
    adjective
    NAmE//ˌmædʒəˈstɪriəl//
     
    (formal)
     
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  1. 1(especially of a person or their behavior) having or showing power or authority He talked with the magisterial authority of the head of the family.
  2. 2(of a book or piece of writing) showing great knowledge or understanding synonym authoritative his magisterial work “The Roman Wall in Scotland”
  3. 3[only before noun] connected with a magistrate
magisterially
 
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adverb
See the Oxford Advanced Learner's Dictionary entry: magisterial