Synonym: cogent evidence, proof, proofread, substantiation, test copy, trial impression, validation. Similar words: roof, uproot, go off, aloofness, room, droop, brook, troop. Meaning: [pruːf] 
n. 1. any factual evidence that helps to establish the truth of something 2. a formal series of statements showing that if one thing is true something else necessarily follows from it 3. a measure of alcoholic strength expressed as an integer twice the percentage of alcohol present (by volume) 4. (printing) an impression made to check for errors 5. a trial photographic print from a negative 6. the act of validating; finding or testing the truth of something. v. 1. make or take a proof of, such as a photographic negative, an etching, or typeset 2. knead to reach proper lightness 3. read for errors 4. activate by mixing with water and sometimes sugar or milk 5. make resistant (to harm). adj. (used in combination or as a suffix) able to withstand.
n. 1. any factual evidence that helps to establish the truth of something 2. a formal series of statements showing that if one thing is true something else necessarily follows from it 3. a measure of alcoholic strength expressed as an integer twice the percentage of alcohol present (by volume) 4. (printing) an impression made to check for errors 5. a trial photographic print from a negative 6. the act of validating; finding or testing the truth of something. v. 1. make or take a proof of, such as a photographic negative, an etching, or typeset 2. knead to reach proper lightness 3. read for errors 4. activate by mixing with water and sometimes sugar or milk 5. make resistant (to harm). adj. (used in combination or as a suffix) able to withstand. 
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31 You'll need your passport as proof of identity.
32 They had conclusive evidence/proof of her guilt.
33 She collated the final proof with the original manuscript.
34 The men were acquitted for lack of proof.
35 The burden of proof lies on the defendant.
36 The tent is proof against water.
37 There was no absolute proof of fraud.
38 The police have no definitive proof of her guilt.
39 The proof was fished up from some old papers.
40 This fact is too evident to require proof.
41 This is proof positive that he stole the money.
42 We had incontestable proof of her innocence.
43 Can you bring forward some proof of the story?
44 There is no proof that the document is authentic.
45 Let's put his theory to the proof.
46 There was no absolute proof.
47 The purest whisky is 80% proof.
48 The burden of proof is on the prosecution.
49 We need absolute proof that he took the money.
50 The police officer asked him for proof of identity.
51 I read the book in proof.
52 What proof is this whisky?
53 This case lacked documentary proof.
54 The shelter was proof against the bitter weather.
55 We didn't have any definite proof.
56 Her virtue would be proof against his charms.
57 We have proof positive that he is in hiding.
58 I enclose my receipt as proof of purchase .
59 The photo was final proof of her husband's infidelity.
60 These figures are living proof of the government's incompetence.