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Definition proof

Etymology

From Middle English proof, borrowed from Old French prove, from Late Latin proba (“a proof”), from Latin probare (“to prove”); see prove; compare also the doublet probe.

Noun

proof (countable and uncountable, plural proofs)

  1. (countable) An effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial.
  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.
  3. The quality or state of having been proved or tried; firmness or hardness which resists impression, or does not yield to force; impenetrability of physical bodies.
  4. (obsolete) Experience of something.
  5. (uncountable, obsolete) Firmness of mind; stability not to be shaken.
  6. (countable, printing) A proof sheet; a trial impression, as from type, taken for correction or examination.
  7. (countable, logic, mathematics) A sequence of statements consisting of axioms, assumptions, statements already demonstrated in another proof, and statements that logically follow from previous statements in the sequence, and which concludes with a statement that is the object of the proof.
  8. (countable, mathematics) A process for testing the accuracy of an operation performed. Compare prove, transitive verb, 5.
  9. (obsolete) Armour of excellent or tried quality, and deemed impenetrable; properly, armour of proof.
  10. (US) A measure of the alcohol content of liquor. Originally, in Britain, 100 proof was defined as 57.1% by volume (no longer used). In the US, 100 proof means that the alcohol content is 50% of the total volume of the liquid; thus, absolute alcohol would be 200 proof.

Adjective

proof (comparative more proof, superlative most proof)

  1. Used in proving or testing.
  2. Firm or successful in resisting.
  3. (of alcoholic liquors) Being of a certain standard as to alcohol content.

Verb

proof (third-person singular simple present proofs, present participle proofing, simple past and past participle proofed)

  1. (transitive, intransitive, colloquial) To proofread.
  2. (transitive) To make resistant, especially to water.
  3. (transitive, cooking) To allow yeast-containing dough to rise.
  4. (transitive, cooking) To test the activeness of yeast.

Results 202 Words with the letters PROOF

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13 letter words with the letters PROOF 
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6 letter words with the letters PROOF 
PROOFS 12
5 letter words with the letters PROOF 
PROOF 11
4 letter words with the letters PROOF 
POOF 10
POOR 7
PROF 10
ROOF 7
3 letter words with the letters PROOF 
FOP 9
FOR 6
FRO 6
POO 6
PRO 6
2 letter words with the letters PROOF 
OF 5
OP 5
OR 2

You can also try words with the phrase PROOF, words starting with the letters PROOF, or words ending in the letters PROOF.