con·clu·sive / kənˈkloōsiv; -ziv/ • adj. (of evidence or argument) serving to prove a case; decisive or convincing. ∎  (of a victory) achieved easily or by a large margin.DERIVATIVES: con·clu·sive·ly adv.con·clu·sive·ness n.

CONCLUSIVE

Determinative; beyond dispute or question. That which is conclusive is manifest, clear, or obvious. It is a legal inference made so peremptorily that it cannot be overthrown or contradicted.

A conclusive presumption cannot be refuted; no evidence can rebut it, as in the presumption that a child who is below a certain age has a fundamental inability to consent to sexual relations.

Conclusive evidence is evidence that is either unquestionable because it is so clear and convincing or because the law precludes its contradiction. A death certificate is considered conclusive evidence that a person has died.