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[uh-thawr-i-tey-tiv, uh-thor-] /əˈθɔr ɪˌteɪ tɪv, əˈθɒr-/
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.
Origin of authoritative
1595-1605; authorit(y) + -ative
Related forms
authoritatively, adverb
authoritativeness, noun
nonauthoritative, adjective
nonauthoritatively, adverb
nonauthoritativeness, noun
unauthoritative, adjective
unauthoritatively, adverb
unauthoritativeness, noun
1. official. 3. dogmatic, authoritarian. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for authoritatively
Contemporary Examples
Historical Examples
  • They were authoritatively informed that there was nothing in all the talk about torpedo boats.

    Last Words Stephen Crane
  • "Jane, come and look after Miss Cecil," he exclaims, authoritatively.

    Floyd Grandon's Honor Amanda Minnie Douglas
  • "Mummy's dressing-table," asserted Master Dick authoritatively.

  • "On the contrary, you will stay here another fortnight," said the doctor, authoritatively.

    White Lies Charles Reade
  • In the class-room, he not only knew more than any other boy, but frequently and authoritatively corrected the teacher.

  • “You will do nothing of the sort,” I said, authoritatively, seeing that she rose to depart.

    Major Frank A. L. G. Bosboom-Toussaint
  • The most illogical ideas are accepted without dispute or examination, providing they are stated solemnly and authoritatively.

    The Art of Logical Thinking William Walker Atkinson
  • “We shall leave everything just as it is,” said Dennison, authoritatively.

    The Pagan Madonna Harold MacGrath
British Dictionary definitions for authoritatively


recognized or accepted as being true or reliable: an authoritative article on drugs
exercising or asserting authority; commanding: an authoritative manner
possessing or supported by authority; official: an authoritative communiqué
Derived Forms
authoritatively, adverb
authoritativeness, 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
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Word Origin and History for authoritatively



c.1600, "dictatorial" (a sense now restricted to authoritarian), from Medieval Latin authoritativus (see authority). Meaning "possessing authority" is recorded from 1650s; that of "proceeding from proper authority" is from 1809. Related: Authoritatively; authoritativeness.

Online Etymology Dictionary, © 2010 Douglas Harper
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