authoritative

Definitions

Having or showing expert knowledge and reliability.

Commanding and likely to be respected or obeyed.

Accepted as the best or most accurate source of information.

Examples

The professor spoke in an authoritative tone that commanded the attention of the entire lecture hall.

She is considered the authoritative source on the history of the Renaissance period.

The government issued an authoritative report detailing the new environmental regulations.

Synonyms

commanding definitive reliable authoritarian masterful convincing official

Antonyms

uncertain unreliable questionable subordinate hesitant unofficial dubious