authoritative - definition in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online (US)

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English definition of “authoritative”

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authoritative

adjective uk   /ɔːˈθɒr.ɪ.tə.tɪv/  us   /əˈθɔːr.ɪ.t̬ə.t̬ɪv/
showing that you are confident, in control, and expect to be respected and obeyed: She has an authoritative manner that at times is almost arrogant. containing complete and accurate information, and therefore respected: The book is an authoritative account of the Second World War.
authoritatively
adverb uk   us   /-li/
(Definition of authoritative from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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