con ‧ clu ‧ sive AC /kənˈkluːsɪv/ BrE AmE adjective
[ Word Family: adjective : ↑ concluding , ↑ conclusive ≠ ↑ inconclusive ; verb : ↑ conclude ; noun : ↑ conclusion ; adverb : ↑ conclusively ≠ ↑ inconclusively ]
showing that something is definitely true OPP inconclusive
conclusive proof/evidence/findings etc
The investigation failed to provide any conclusive evidence.
—conclusively adverb