MAGISTERIALLY

authoritatively, magisterially

(adverb) in an authoritative and magisterial manner; “she spoke authoritatively”

dictatorially, autocratically, magisterially

(adverb) in an overbearingly domineering manner; as a dictator; “this manager acts dictatorially toward his colleagues”

Source: WordNet® 3.1

Etymology

Adverb

magisterially (comparative more magisterially, superlative most magisterially)

In a magisterial manner; authoritatively.

Source: Wiktionary

Mag`is*te"ri*al*ly, adv.

Definition: In a magisterial manner.

MAGISTERIAL

Mag`is*te"ri*al, a. Etym: [L. magisterius magisterial. See Master.]

1. Of or pertaining to a master or magistrate, or one in authority; having the manner of a magister; official; commanding; authoritative. Hence: Overbearing; dictatorial; dogmatic. When magisterial duties from his home Her father called. Glover. We are not magisterial in opinions, nor, dictator-like, obtrude our notions on any man. Sir T. Browne. Pretenses go a great way with men that take fair words and magisterial looks for current payment. L'Estrange.

2. (Alchem. & Old Chem.)

Definition: Pertaining to, produced by, or of the nature of, magistery. See Magistery, 2.

Syn.

– Authoritative; stately; august; pompous; dignified; lofty; commanding; imperious; lordly; proud; haughty; domineering; despotic; dogmatical; arrogant.

– Magisterial, Dogmatical, Arrogant. One who is magisterial assumes the air of a master toward his pupils; one who is dogmatical lays down his positions in a tone of authority or dictation; one who is arrogant in sults others by an undue assumption of superiority. Those who have long been teachers sometimes acquire, unconsciously, a manner which borders too much on the magisterial, and may be unjustly construed as dogmatical, or even arrogant.

Source: Webster’s Unabridged Dictionary 1913 Edition