conclusive

adjective

con·​clu·​sive kən-ˈklü-siv 

-ziv

1

: of, relating to, or being a conclusion

2

: putting an end to debate or question especially by reason of irrefutability

The results were not conclusive.

conclusively adverb

conclusiveness noun

Synonyms

• absolute
• clear
• deciding
• decisive
• definitive
• last

Choose the Right Synonym for conclusive

conclusive, decisive, determinative, definitive mean bringing to an end.

conclusive applies to reasoning or logical proof that puts an end to debate or questioning.

conclusive evidence

decisive may apply to something that ends a controversy, a contest, or any uncertainty.

a decisive battle

determinative adds an implication of giving a fixed character or direction.

the determinative factor in the court's decision

definitive applies to what is put forth as final and permanent.

the definitive biography

Examples of conclusive in a Sentence

the archeological discovery was conclusive proof that the Vikings had indeed settled in North America around 1000 A.D.

a conclusive argument for allowing the students to put on a play of their own choosing

Recent Examples on the Web

Nor is there any conclusive evidence on dosing and timing for supplements. —Sarah Anzlovar, Ms, Verywell Health, 2 Apr. 2025

Stone, as he's done before without providing conclusive evidence, took aim at the Central Intelligence Agency. —Lalee Ibssa, ABC News, 1 Apr. 2025

The results were conclusive: More than two-thirds (69%) of seniors felt lonely a majority of the time (50% of the time or more) before moving into a senior living community. —Sara Zeff Geber, Forbes.com, 31 Mar. 2025

While some research has suggested a link between certain dyes and an increase in hyperactivity and moodiness or irritability in children, the evidence still isn’t conclusive, which may explain why the FDA is taking so long, Nestle said. —Berkeley Lovelace Jr., NBC News, 23 Mar. 2025

Word History

Etymology

see conclude

First Known Use

1536, in the meaning defined at sense 1

Rhymes for conclusive

• abusive
• allusive
• collusive
• conducive
• delusive
• diffusive
• elusive
• exclusive
• extrusive
• illusive
• inclusive
• intrusive

Kids Definition

conclusive

adjective

con·​clu·​sive kən-ˈklü-siv 

-ziv

: decisive sense 1, convincing

conclusive proof

conclusively adverb

conclusiveness noun

Legal Definition

conclusive

adjective

con·​clu·​sive

1

: of, relating to, or being a conclusion

2

: putting an end to debate or question especially by reason of inability to be refuted

conclusively adverb

conclusiveness noun