magisterialEnglishOxford American Thesaurusmagisterial adjective 1 a magisterial pronouncement: authoritative, masterful, lordly, judge-like. 2 his magisterial style of questioning: domineering, dictatorial, autocratic, imperious, bossy, overbearing, peremptory, pompous, lofty, overweening, high-handed, arrogant, haughty; confident, self-confident, overconfident, supercilious, patronizing. ▷antonyms hesitant, tentative.