demonstrably

American  

[dih-mon-struh-blee] / dɪˈmɒn strə bli /

adverb

1. in a way that can be demonstrated or proved.

   Privatization may be good for the government contractors who profit, but it's demonstrably less efficient in sectors like health care.

2. very evidently; obviously.

   Earlier in the game, the wide receiver was demonstrably agitated about not getting the ball enough.

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Other Word Forms

• nondemonstrably adverb
• undemonstrably adverb

Etymology

Origin of demonstrably

demonstrab(le) ( def. ) + -ly

Example Sentences

That has been countered by Ulmen's lawyer Schertz, who says the key points that have been reported about Ulmen are "demonstrably incomplete and incorrect" and subject to legal proceedings.

From BBC • Mar. 28, 2026

“Coding has become the first domain where AI demonstrably outperforms humans at scale,” the analysts say.

From The Wall Street Journal • Feb. 24, 2026

His 24-page ruling also castigated both Immigration and Customs Enforcement agents and government lawyers for submitting “evasive and demonstrably false” claims to the court under oath.

From Slate • Dec. 20, 2025

That, coupled with the recently released dismal job numbers, means the state of things is starting to look demonstrably worse.

From Salon • Dec. 18, 2025

These admirable institutions are demonstrably useful for the management of certain forms of mental disease, but that is another matter.

From "The Lives of a Cell" by Lewis Thomas