Synonyms: authorised, authoritative, authorized
Definition: sanctioned by established authority
Usage: an authoritative communique; the authorized biography
Similar words: official
Definition: having official authority or sanction
Usage: official permission; an official representative
Synonyms: important, authoritative
Definition: having authority or ascendancy or influence
Usage: an important official; the captain's authoritative manner
Similar words: influential
Definition: having or exercising influence or power
Usage: an influential newspaper; influential leadership for peace
Synonyms: classic, classical, authoritative, definitive
Definition: of recognized authority or excellence
Usage: the definitive work on Greece; classical methods of navigation
Similar words: standard
Definition: established or well-known or widely recognized as a model of authority or excellence
Usage: a standard reference work; the classical argument between free trade and protectionism