**Proof** may refer to:

- Proof (truth), argument or sufficient evidence for the truth of a proposition
- Formal proof
- Mathematical proof, a convincing demonstration that some mathematical statement is necessarily true
- Proof theory, a branch of mathematical logic that represents proofs as formal mathematical objects
- Alcohol proof, a measure of an alcoholic drink's strength
- Artist's proof, a single print taken during the printmaking process
- Galley proof, a preliminary version of a publication
- Prepress proof, a facsimile of press artwork for job verification
- Proof coinage, coins once made as a test, but now specially struck for collectors
- Proofreading, reviewing a manuscript or artwork for errors or improvements
- Proofing (baking technique), the process by which a yeast-leavened dough rises, also called "proving"

In **entertainment**:

*Proof*(TV series), an Irish TV drama/thriller*Proof*, 1980 B/W student film by Black-and-white, expanded to*Fandango**Proof*(1991 film), an Australian film by Jocelyn Moorhouse*Proof*(play), a play by David Auburn*Proof*(2005 film), a film by John Madden, based on the play

- Proof (rapper) (1973–2006), American rapper and member of D12
*Proof*(comics), a comic series from Image Comics- "Proof", a 1942 hard SF short story by Hal Clement
- "Proof", a song by Coldplay from "Speed of Sound"
- "Proof" (I Am Kloot song), a song by I Am Kloot from their eponymous second album
- "Proof", a song by Paul Simon from
*The Rhythm of the Saints* - "Proof", a song by Happy Rhodes from
*Many Worlds Are Born Tonight* - "Proof", a song by angela
- "Proof", a song by Mell

### Famous quotes containing the word proof:

“There are some persons in this world, who, unable to give better *proof* of being wise, take a strange delight in showing what they think they have sagaciously read in mankind by uncharitable suspicions of them.”

—Herman Melville (1819–1891)

“Ah! I have penetrated to those meadows on the morning of many a first spring day, jumping from hummock to hummock, from willow root to willow root, when the wild river valley and the woods were bathed in so pure and bright a light as would have waked the dead, if they had been slumbering in their graves, as some suppose. There needs no stronger *proof* of immortality. All things must live in such a light. O Death, where was thy sting? O Grave, where was thy victory, then?”

—Henry David Thoreau (1817–1862)

“The *proof* of a poet is that his country absorbs him as affectionately as he has absorbed it.”

—Walt Whitman (1819–1892)