DictionarydefinitiveAuthoritative and conclusive
adjective

definitive

dih-FIN-uh-tiv/dɪˈfɪnətɪv/

Establishing something conclusively and precisely.

The judge points to the photo as definitive proof of the winner.

An official race photo-finish judge points to a clear close-view illustration showing one runner decisively ahead at the finish line, settling a dispute between two calm athletes.
Etymology

Bounding something completely can also mean bringing it to an end. Definitive carries this conclusive force: it describes something that settles an issue with finality, not merely something clearly stated.

In context

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However, no definitive interpretation has been agreed upon as the carvings lack any clear parallels
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More examples

  • The test provides a definitive answer about whether the water is safe.
  • Scholars consider this the definitive edition of her collected poems.
  • The survey provides a definitive map of the property boundaries.

Forms

definitive

definitively adverb — In a conclusive and authoritative way.

Similar words

conclusive
Emphasizes settling a question by ruling out further doubt.
authoritative
Emphasizes trusted expertise rather than necessarily settling a question.
precise
Emphasizes exactness without necessarily providing a final or authoritative answer.