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authoritative

 
Adjective authoritative has 3 senses
  1. authoritative, important - having authority or ascendancy or influence; "an important official"; "the captain's authoritative manner"
    Antonym: uninfluential (indirect, via influential)
  2. authoritative, classical, definitive - of recognized authority or excellence; "the definitive work on Greece"; "classical methods of navigation"
    Antonym: nonstandard (indirect, via standard)
  3. authoritative, authorized, authorised - sanctioned by established authority; "an authoritative communique"; "the authorized biography"
    Antonym: unofficial (indirect, via official)
authoring language authorisation authorise authorised authoriser authoritarian authoritarianism authoritate authoritative authoritatively authoritativeness authorite authorited authorities authoritiesclaim authoritise authoritize

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