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.

Powered by Proof, online notarization is as simple as uploading your document, verifying your identity, and connecting with an on-demand notary. Get Notarize℠ for your customers.

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

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

Jan 2, 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.

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 …

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.