Meaning: (of evidence or argument) having or likely to have the effect of proving a case; decisive.
Example: conclusive evidence.
Synonyms: incontrovertible, incontestable, irrefutable, unquestionable, undeniable, indisputable, unassailable, beyond dispute, beyond question, beyond doubt, beyond a shadow of a doubt, certain, decisive, convincing, clinching, definitive, definite, positive, final, ultimate, categorical, demonstrative, unequivocal, unarguable, unanswerable, uncontroversial