proof

1. (countable) An effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial.Examples: "I need proof of your unconditional love. Lend me some dough."; "1591, Edmund Spenser, Prosopopoia: or, Mother Hubbard's Tale, later also published in William Michael Rossetti, Humorous Poems, But the false Fox most kindly played his part, For whatsoever mother-wit or art Could work he put in proof. No practice sly, No counterpoint of cunning policy, No reach, no breach, that might him profit bring. But he the same did to his purpose wring."; "France I more praise and love; you are, my lord, Yourself for horsemanship much famed; and there You shall have many proofs to shew your skill."Antonyms: disproofcountable

2. (uncountable) The degree of evidence which convinces the mind of any truth or fact, and produces belief; a test by facts or arguments which induce, or tend to induce, certainty of the judgment; conclusive evidence; demonstration.Examples: "I'll have some proof."; "It was a grand sentence of Emanuel Swedenborg, which would alone indicate the greatness of that man's perception, — "It is no proof of a man's understanding to be able to confirm whatever he pleases; but to be able to discern that what is true is true, and that what is false is false, this is the mark and character of intelligence.""; "Faith, faith is an island in the setting sun But proof, yes Proof is the bottom line for everyone"Synonyms: testamentuncountable

3. (obsolete) Experience of something.Examples: "But the chaste damzell, that had never priefe / Of such malengine and fine forgerye, / Did easely beleeve her strong extremitye."countableobsoleteuncountable

4. (uncountable, obsolete) Firmness of mind; stability not to be shaken.obsoleteuncountable

5. (countable, printing) A proof sheet; a trial impression, as from type, taken for correction or examination.Examples: "And these men scour the printed proof for error, blunder, and misspelling."countable

6. (numismatics) A limited-run high-quality strike of a particular coin, originally as a test run, although nowadays mostly for collectors' sets.countableuncountable