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Definitions

conclusive

[kuhn-kloo-siv] / kənˈklu sɪv /
ADJECTIVE
definite, final
Synonyms
STRONGEST
compelling convincing decisive indisputable irrefutable irrevocable precise unambiguous undeniable unmistakable
WEAK
absolute all out clear clinching cogent deciding demonstrative determinant determinative flat out incontrovertible irrefragable irrefrangible litmus test resolving revealing settling straight out telling ultimate unanswerable unarguable unconditional unquestionable what you see is what you get
Antonyms
STRONGEST
ambiguous disputable doubtful dubious indefinite questionable refutable uncertain unsure
WEAK
inconclusive

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

There is no conclusive evidence as to what those shipments contained.

From Barron's • Mar. 16, 2026

The most conclusive evidence came in 2018 when Israel whisked Iran’s secret nuclear archives out of Tehran.

From The Wall Street Journal • Mar. 15, 2026

"Studies have found increasing TFA levels in remote Arctic ice-cores and our results provide the first conclusive evidence that virtually all of these deposits can be explained by these gases."

From Science Daily • Feb. 6, 2026

Did the VAR, Paul Tierney, really have conclusive proof the whole of the ball was over the line?

From BBC • Feb. 1, 2026

But they are all too far away and therefore too difficult to observe to provide conclusive evidence of black holes.

From "A Brief History of Time: And Other Essays" by Stephen Hawking

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.