authoritative

[ uh-thawr-i-tey-tiv, uh-thor- ]
/ əˈθɔr ɪˌteɪ tɪv, əˈθɒr- /
SEE SYNONYMS FOR authoritative ON THESAURUS.COM

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.

Origin of authoritative

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

OTHER WORDS FROM authoritative

Words nearby authoritative

author's alteration, authoress, authoring, authoritarian, authoritarian personality, authoritative, authority, authority control, authority figure, authority file, authorization

Example sentences from the Web for authoritatively

British Dictionary definitions for authoritatively

authoritative
/ (ɔːˈθɒrɪtətɪv) /

adjective

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 of authoritative

authoritatively, adverb authoritativeness, noun