Proof
A printed sheet to be examined and approved before it is
finally printed. The first proof is that which contains all the
workman's errors; when these are corrected the impression next taken is
called a clean proof and is submitted to the author; the final
impression, which is corrected by the reader ad unguem, is
termed the press proof.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894 More on Proof from Fact Monster:
 proof, in mathematics  proof proof, in mathematics, finite sequence of propositions each of which is either an axiom or ...
 evidence  evidence evidence, in law, material submitted to a judge or a judicial body to resolve disputed ...
 proof, in law  proof proof, in law: see evidence.
 proof, in printing  proof proof, in printing, a trial impression for inspection. Proofreading. is the inspection and ...
 RabbitProof Fence  Starring Ningali Lawford, Jason Clarke, Deborah Mailman, David Gulpilil, Kenneth Branagh
