Synonyms of 'authoritative'

authoritative

authoritative - adjective

Having or arising from authority: conclusive, official, sanctioned, standard. See true.
Worthy of belief, as because of precision or faithfulness to an original: authentic, convincing, credible, faithful, true, trustworthy, valid. See true.
Serving the function of deciding or settling with finality: conclusive, decisive, definitive, determinative, final. See decide.
Exercising authority: commanding, dominant, lordly, masterful. See over. strong.