Synonyms and Antonyms of authoritative
- this book is considered the most authoritative source on that subject
- after a couple of authoritative critics panned the movie, the other reviewers rushed to say how awful it was
- she's very authoritative for someone who doesn't actually outrank us
arrogant, assumptive, disdainful, fastuous, haughty, highfalutin (also hifalutin), high-and-mighty, high-hat, huffy, important, lofty, lordly, overweening, presuming, presumptuous, pretentious, proud, self-asserting, supercilious, superior, toplofty (also toploftical), uppish, uppity
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