Meaning & use
authoritative
Recognized as accurate, reliable, and commanding respect because of expertise, evidence, or official standing.
See it in a sentence
The professor's authoritative book on the subject is still cited by researchers today.
He spoke in an authoritative tone that made everyone in the room listen closely.
A note on using this word
Authoritative can describe a trustworthy source of information or a confident, commanding manner of speaking or behaving.
Words with a similar meaning
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Words with an opposite meaning
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