noun
proof
proof
noun
1
Evidence or facts that show something is true.
"The receipt is proof that she paid for the item."
"Scientists demanded more proof before accepting the theory."
2
A test print of a document or image made for checking before final printing.
"The editor marked up the proof with corrections before it went to press."
3
A measure of the alcohol content of a spirit.
"The whisky was bottled at 100 proof."
adj
1
Able to resist something, especially damage.
"The jacket is proof against wind and rain."
verb
1
To check a text for errors before it is published.
"She proofed the newsletter one last time before sending it out."
2
To let dough rise before baking.
"Let the dough proof for an hour in a warm place."
How to Use Proof
Learner’s notesIn plain EnglishEvidence that something is true, or a test version of something before it's finalized.
Common pairings
proof of purchase
burden of proof
proof of concept
Word Forms
more proof comparative, proofed past tense, proofs plural, proofs singular, most proof superlative
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Etymology
From Old French prove, from Late Latin proba ("a proof"), from Latin probō ("to test, to prove"). A doublet of probe.