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The meaning of PROOF is the cogency of evidence that compels acceptance by the mind of a truth or a fact. How to use proof in a sentence.

PROOF definition: 1. a fact or piece of information that shows that something exists or is true: 2. a logical…. Learn more.

evidence, proof - Evidence—from Latin e-, "out," and videre, "to see"— is information that helps form a conclusion; proof is factual information that verifies a conclusion.

Definition of proof noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Proof theory, a branch of mathematical logic that represents proofs as formal mathematical objects Statistical proof, demonstration of degree of certainty for a hypothesis

Proof is a fact, argument, or piece of evidence which shows that something is definitely true or definitely exists. This is not necessarily proof that he is wrong.

Jan 9, 2026 · Do the math. David Auburn’s celebrated, carefully calculated drama Proof returns to Broadway in a revival led by The Bear Emmy winner Ayo Edebiri and Tony winner and Oscar …

Apr 17, 2026 · Just one piece of the first Broadway revival of David Auburn’s most famous play answers the question “What exactly is ‘Proof’ + 26 years?” Ayo Edebiri.