say it: uh-THAW-ruh-tay-tiv
authoritative is an adjective meaning "having authority or ascendancy or influence". It carries 3 recorded senses.
having authority or ascendancy or influence
“an important official”
“the captain's authoritative manner”
of recognized authority or excellence
“the definitive work on Greece”
sanctioned by established authority
“an authoritative communique”
“the authorized biography”
Definitions, synonyms and semantic relations for authoritative come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.