The Meaning of authoritative

• (a.) Having, or proceeding from, due authority; entitled to obedience, credit, or acceptance; determinate; commanding.
• (a.) Having an air of authority; positive; dictatorial; peremptory; as, an authoritative tone.

Synonyms

important , classical , classic , definitive , authorized , authorised

Rhymes

accommodative , accumulative , administrative , alliterative , appreciative , collaborative , commemorative , cooperative , creative , dative , deliberative , facultative , imitative , innovative , investigative , iterative , legislative , manipulative , native , nonnative , probative , prognosticative , qualitative , quantitative , regulative , rehabilitative , stative , stimulative , vegetative