In a magistral manner; authoritatively, dogmatically.

Officiously, interferingly; impudently; opinionatedly, dogmatically; conceitedly, vainly. Now rare.

In a magisterial manner: (a) like a schoolmaster or magistrate; with superior knowledge or judgement, or the assumption of it; authoritatively; (b)…

In a thetical manner; by way of assertion or positive statement; positively.

With an assumption of undeniable certainty; positively or imperiously in the assertion of opinion. Now the dominant sense.

= magisterially, adv.

In the manner of a judge pronouncing a judgment; dogmatically. Cf. judicious, adj. 4. Obsolete. rare.

In a cocksure manner; overconfidently, with brash self-confidence.