authoritative

[ uh-thawr-i-tey-tiv, uh-thor- ]
/ əˈθɔr ɪˌteɪ tɪv, əˈθɒr- /

adjective

having due authority; having the sanction or weight of authority: an authoritative opinion.
substantiated or supported by documentary evidence and accepted by most authorities in a field: an authoritative edition of Shakespeare; an authoritative treatment of a subject.
having an air of authority; accustomed to exercising authority; positive; peremptory; dictatorial: said with an authoritative air.

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Origin of authoritative

First recorded in 1595–1605; authorit(y) + -ative

OTHER WORDS FROM authoritative

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for authoritative

British Dictionary definitions for authoritative

authoritative
/ (ɔːˈθɒrɪtətɪv) /

adjective

recognized or accepted as being true or reliablean authoritative article on drugs
exercising or asserting authority; commandingan authoritative manner
possessing or supported by authority; officialan authoritative communiqué

Derived forms of authoritative

authoritatively, adverbauthoritativeness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012