Added 1 October 2026
authoritative
/ɔːˈθɒɹɪtətɪv/ adjective
adjective Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about authoritative at Wordnik → Where our words come from →
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Arising or originating from a figure of authority.
The authoritative rules in this school come not from the headmaster but from the aged matron.
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Highly accurate or definitive; treated or worthy of treatment as a scholarly authority.
This book is the world's most authoritative guide to insect breeding habits.
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Having a commanding style.
He instructed us in that booming, authoritative voice of his.