Noun
The quality of possessing authority.
The quality of trustworthiness and reliability.
Source: en.wiktionary.orgThe permissiveness of society must be balanced with authoritativeness. Ferdinand Marcos
For purposes of argument, I accept the authoritativeness of scripture, and will argue on those grounds. Source: Internet
The machine-learning algorithms do this by clustering documents to a given query into various “sentiments”, weighing these based on the perceived authoritativeness of a source. Source: Internet