Authoritative
Authoritative adjective - Being the most accurate and apparently thorough.
Usage example: this book is considered the most authoritative source on that subject
Definitive is a synonym for authoritative in decide topic. In some cases you can use "Definitive" instead an adjective "Authoritative", when it comes to topics like valid, reliable. popular alternative
Nearby Words: authority, authoritarian
Definitive
Definitive adjective - Being the most accurate and apparently thorough.
Usage example: the definitive work on the attack on Pearl Harbor
Authoritative is a synonym for definitive in decide topic. You can use "Authoritative" instead an adjective "Definitive". popular alternative
Mutual synonyms
Related pairs
- sound and authoritative
- sound and definitive
- established and authoritative
- established and definitive
- standard and authoritative
- standard and definitive
- valid and authoritative
- valid and definitive
- accurate and authoritative
- accurate and definitive
- forceful and authoritative
- forceful and definitive
- convincing and authoritative
- convincing and definitive
Both words in one sentence
- The Experts Speak: The Definitive Compendium of Authoritative Misinformation, published in 1984 by Christopher Cerf and Victor Nevasky, is an entire book of quotations by experts being wrong, either through a lack of information or a lack of imagination.
Cite this Source
Definitive and Authoritative. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/authoritative/definitive
Authoritative & Definitive. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/authoritative/definitive>.
Definitive or Authoritative. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/authoritative/definitive.
Google Ngram Viewer shows how "authoritative" and "definitive" have occurred on timeline