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conclusive
/kənˈkluːsɪv/
providing final proof
The DNA test provided conclusive evidence of his innocence.
The DNA test gave final, undeniable proof that he was not guilty.
Law
formal
Serving to prove something definitely; leaving no doubt.
The jury found the witness's testimony conclusive.
The jury considered the witness's statement as final proof.
Often used in legal or scientific contexts to describe evidence that ends a debate or investigation.
formal
Ending a matter or discussion by providing a final answer.
Scientists are still looking for conclusive data on the climate model.
Researchers need final, indisputable data to confirm the climate model.
Implies that no further argument or investigation is necessary.
Collocations
conclusive evidenceproof that settles a matter beyond doubtconclusive proofundeniable demonstration of truthconclusive resulta final outcome that ends uncertainty
Pro Tip
Usage Tip
Use 'conclusive' when you want to emphasize that a matter is settled. Avoid using it for opinions or feelings, as it implies objective proof.
Gold Rule
Formality Check
This is a formal word. Do not use it in casual conversation (e.g., say 'sure proof' or 'final answer' instead of 'conclusive proof' in casual chat).
Word Origin
From Latin 'conclusivus', from 'concludere' meaning 'to shut in' or 'to end'.
Usage Notes
Use this word when something ends a discussion or proves a point completely. It is stronger than 'strong' or 'good' evidence. It is often used in formal writing, news reports, and legal documents.
Word Breakdown
con-
completely/together
prefix-clude
to shut/close (from Latin claudere)
root-ive
having the nature of
suffixEnglish Dictionary