Proof

The word proof can mean:

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• originally, a test assessing the validity or quality of something.
• a rigorous, compelling argument, including:
• a logical argument or a mathematical proof (see also proof theory).
• a legal proof.
• a large accumulation of scientific evidence.
• as an adjective, to mean firm or successful in resisting.
• Rabbit-Proof Fence (film), film based on a book.
• a photograph, print or page layout presented as an example for proofreading or approval.
• alcoholic proof, a measure of how much ethanol is in an alcoholic beverage.
• proof coinage, a coin made as an example of a particular strike.
• Proof (play), a play by David Auburn.
• Proof (film), a film by John Madden.
• Proof (rapper), a rapper and member of the group D12.
• Yeast (baking) yeast or leavening agent, with sugar and water before making activator, beer, bread, cider, dough, or wine.
• Proof - referring to the testing process for determining the integrity of a firearm. See Birmingham Gun Barrel Proof House.