definition of authoritative
authoritative adjective. âº having the âpower of âspecial âknowledge, or (of a âperson) âshowing the âconfidence of having âspecial âknowledge: an authoritative âmanner Her âopinion on the âsubject was âconsidered authoritative. having the âpower of âspecial âknowledge, or (of a âperson) âshowing the âconfidence of having âspecial âknowledge: an authoritative âmanner Her âopinion on the âsubject was âconsidered authoritative.