Proof
/prˈuf/
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Definition
(noun) An effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial.
Sentence Examples
People are often quite skeptical about things unless given believable proof.
We have absolute proof that smoking is bad for your health.
CEFR Practice Quiz
The scientist presented compelling ____ that the new compound was effective against the bacteria.