What is Proof?

Proof definition and meaning on Dictionary terms:
evidence sufficient to establish a thing as true, or to produce belief in its truth.
anything serving as such evidence: What proof do you have?

the act of testing or making trial of anything; test; trial: to put a thing to the proof.
the establishment of the truth of anything; demonstration.
Law. (in judicial proceedings) evidence having probative weight.
the effect of evidence in convincing the mind.
an arithmetical operation serving to check the correctness of a calculation.
Mathematics, Logic. a sequence of steps, statements, or demonstrations that leads to a valid conclusion.
a test to determine the quality, durability, etc., of materials used in manufacture.
Distilling. the arbitrary standard strength, as of an alcoholic liquor.strength with reference to this standard: