proof

proof1 [ pruf ] noun **

1. ) count or uncount information or evidence that shows that something is definitely true or definitely exists:

proof of: We were unable to establish proof of her innocence.

Do you have any proof of identity (=a document such as a passport that proves who you are)?

proof that: Do you have any proof that this is true?

2. ) uncount a standard for measuring the strength of an alcoholic drink

3. ) count usually plural TECHNICAL a copy of a book or article that someone reads and corrects before the final copy is made:

Whiskey that is 100 proof actually contains 50 % alcohol.

living proof

someone who is living proof of something is an example that proves it to be true:

She's living proof of the saying that life begins at fifty.

the proof of the pudding (is in the eating)

you can only judge the quality of something by trying it for yourself

proof positive INFORMAL

something that makes you certain that something is true or exists:

She regarded the ring as proof positive of his love.

proof

proof 2 [ pruf ] adjective

if something is proof against someone or something, it is not affected or damaged by them

proof

proof 3 [ pruf ] verb transitive

1. ) to protect something from being affected or damaged by something else:

a proofed cotton raincoat

2. ) INFORMAL PROOFREAD