- 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
Synonyms for authoritative
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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
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
Word Origin and History for non-authoritative
Online Etymology Dictionary, © 2010 Douglas Harper