1 necessarily or demonstrably true; "demonstrable truths" [syn: incontrovertible]
2 capable of being demonstrated or proved; "obvious lies"; "a demonstrable lack of concern for the general welfare"; "practical truth provable to all men"- Walter Bagehot [syn: provable]
- Easily able to be demonstrated.
- It is demonstrable that water extinguishes fire.
absolute, actual, admitting no question, apodictic, apparent, attestable, authenticatable, certain, checkable, conclusive, confirmable, demonstratable, demonstrated, displayable, displayed, evident, evincible, exhibitable, exhibited, factual, historical, inappealable, incontestable, incontrovertible, indisputable, indubitable, irrefragable, irrefutable, manifest, obvious, positive, provable, real, self-evident, shown, substantiatable, supportable, sustainable, testable, unanswerable, unconfutable, undeniable, unimpeachable, unquestionable, unrefutable, validatable, verifiable