proof Definition

proof
noun

1. Evidence, especially conclusive evidence, that something is true or a fact.

Thesaurus: evidence, authentication, verification, certification, documentation, confirmation, corroboration, substantiation, attestation.
2. law.
The accumulated evidence on which a verdict is based.
3. Scots law.
A trial held before a judge without a jury.
4. The activity or process of testing or proving.
5. A test, trial or demonstration.

Thesaurus: trial, attempt, test, testimony, ordeal, demonstration, experiment, examination, scrutiny, assay.
6. math.
A step-by-step verification of a proposed mathematical statement.
7. printing.
A trial copy of printed text used for examination or correction.
8. A trial print from a photographic negative.
9. A trial impression from an engraved plate.
10. A measure of the alcohol content of a distilled liquid, especially an alcoholic beverage, equal to 49.28% of alcohol by weight.

adj

1. Able or designed to withstand, deter or be free from or secure against a specified thing.

Example: proof against storms
Example: leakproof
Thesaurus: repellent, impervious, resistant, impenetrable, strong, tight, proofed, treated; Antonym: permeable, untreated.

verb proofed, proofing

1. To make something resistant to or proof against a specified thing. Often in compounds.

Example: to damp-proof the walls
2. To take a proof of (printed material).
3. To proof-read.

Etymology: 13c: from French preuve, from Latin proba, from probare to test.