What is another word for authoritative?

Need synonyms for authoritative? Here's a list of words from our thesaurus that you can use instead.

Recognized as being reliable
“If the IRS is the authoritative source of tax information, is there any reason to look elsewhere on the Net for tax expertise?”
Possessing authority
“Henry, fighting the urge to just disappear and let the battle rage on, shifted somewhat pompously and very self-confidently into a loud authoritative voice.”
Being the most accurate and apparently thorough
“It stands without peer in the public arena as the most authoritative record of one of the nation's most trying experiences.”
Having power over the minds or behavior of others
“… after a couple of authoritative critics panned the movie, the other reviewers rushed to say how awful it was.”
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