Definition Of authoritative
able to be trusted as being accurate or true; reliable.
clear, authoritative information and advice
commanding and self-confident; likely to be respected and obeyed.
she had an authoritative air
Example Of authoritative
Although the Internet can be an excellent source of up to date and authoritative information much of it is unchecked and possibly unreliable.
An authoritative German voice crisped the air, asserting itself above the general drone.
As in other titles in this series, this has the authoritative text (here based on the first British edition of 1886 which sold for 1s.).
‘Bring him to me,’ she commanded, her voice authoritative and unwavering.
But there are more authoritative and accurate sources on which to spend your money.