Evidence or documentation that establishes a fact

• Conclusive grounds for belief

A trial or process for checking quality or truth

• An act of verification

A logical argument that demonstrates a theorem

• A sequence of steps deriving a conclusion

A preliminary copy for checking before final production

• A trial impression or sample print

Measure of alcohol strength in spirits

• In the US, proof equals twice alcohol by volume

Resistant to a specified thing, often in compounds

• Not penetrated or affected by something

Having a stated proof of alcohol

• Of a specified alcoholic standard

To read and correct text before publication

To make resistant, especially to water

To allow dough to rise

• To test yeast activity

To test a firearm under high pressure