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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.

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.

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

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.

Proof is the evidence that shows something is true or valid. When you show the logical steps that take you from your hypothesis that the world is round to the conclusion that it is, you're formulating a proof.

to treat or coat for the purpose of rendering resistant to deterioration, damage, etc. (often used in combination): to proof a house against termites; to shrink-proof a shirt.

Apr 14, 2026 · proof (countable and uncountable, plural proofs) (countable) An effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial.