Clues for the word "PROOF"

We've had 97 crossword clues used for this word, and seen it 178 times in crosswords. It was last seen in Daily Cryptic crossword on August 16, 2026.

Definition of proof

n. - Any effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial.
n. - That degree of evidence which convinces the mind of any truth or fact, and produces belief; a test by facts or arguments that induce, or tend to induce, certainty of the judgment; conclusive evidence; demonstration.
n. - The quality or state of having been proved or tried; firmness or hardness that resists impression, or does not yield to force; impenetrability of physical bodies.
n. - Firmness of mind; stability not to be shaken.
n. - A trial impression, as from type, taken for correction or examination; -- called also proof sheet.
n. - A process for testing the accuracy of an operation performed. Cf. Prove, v. t., 5.
v. t. - Armor of excellent or tried quality, and deemed impenetrable; properly, armor of proof.
a. - Used in proving or testing; as, a proof load, or proof charge.
a. - Firm or successful in resisting; as, proof against harm; waterproof; bombproof.
a. - Being of a certain standard as to strength; -- said of alcoholic liquors.