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.

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

PROOF meaning: 1 : something which shows that something else is true or correct often + of; 2 : an act or process of showing that something is true

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

[uncountable] evidence or facts that are sufficient to establish a thing as true or believable. Mathematics, Philosophy [countable]a sequence of steps, statements, or demonstrations that …

Proof is a fact, argument, or piece of evidence showing that something is definitely true or definitely exists. This is not necessarily proof that he is wrong. You have to have proof of …

Jan 2, 2026 · (countable, logic, mathematics) A sequence of statements consisting of axioms, assumptions, statements already demonstrated in another proof, and statements that logically …