Purity may refer to:

Books

* ''Pureza'' (novel), a 1937 Brazilian novel by José Lins do Rego * ''Purity'' (novel), a 2015 novel by Jonathan Franzen ** ''Purity'' (TV series), a TV series based on the novel *''Purity'', a 2012 novel by

Jackson Pearce Jackson Pearce (born 1984) is an American author. She writes young adult fiction and also publishes as J. Nelle Patrick. Personal life and education Pearce was born in Raleigh, North Carolina and, , lives in Decatur, Georgia. She started writing ...

*''Purity'', a 1998 novel by

Shaun Hutson Shaun Hutson (born 1958) is a British novelist in the horror and crime genres. Under his own name and various pen names, he has written at least thirty novels. Background A native of Letchworth Garden City in Hertfordshire, England, Hutson no ...

*''Purity'', a 2007 play by Thomas Bradshaw (playwright) *''

Cleanness ''Cleanness'' (Middle English: ''Clannesse'') is a Middle English alliterative poem written in the late 14th century. Its unknown author, designated the ''Pearl poet'' or ''Gawain poet'', also appears, on the basis of dialect and stylistic eviden ...

'', also known as ''Purity'', a 14th-century poem

Companies

* Purity Dairies, a dairy company in Nashville, Tennessee, United States * Purity Factories, a food processing company in St. John's, Newfoundland and Labrador, Canada * Purity Distilling Company, an alcohol manufacturer involved in the Boston Molasses Disaster in the U.S. * Purity FM, a Nigerian radio station *Purity, a former supermarket brand owned by

Woolworths Supermarkets Woolworths Supermarkets (colloquially known in Australia as "Woolies") is an Australian chain of supermarkets and grocery stores owned by Woolworths Group. Founded in 1924, Woolworths today is Australia's biggest supermarket chain with a mar ...

(Australia)

Film

* ''Purity'' (film), a 1916 motion picture *Purity by Anat Zuria * Black oil (''The X-Files'') (also known as Purity), a fictional alien virus in the TV series ''The X-Files''

Music

*"Purity", a 1999 song by Slipknot on their debut self-titled album * ''Purity'' (Hate Forest album) (2003)

Religion

*Purity, the absence of

vice A vice is a practice, behaviour, or habit generally considered immoral, sinful, criminal, rude, taboo, depraved, degrading, deviant or perverted in the associated society. In more minor usage, vice can refer to a fault, a negative character tra ...

in human character, synonymous with

chastity Chastity, also known as purity, is a virtue related to temperance. Someone who is ''chaste'' refrains either from sexual activity considered immoral or any sexual activity, according to their state of life. In some contexts, for example when mak ...

when used in reference to a person's sexual nature *

Ritual purification Ritual purification is the ritual prescribed by a religion by which a person is considered to be free of ''uncleanliness'', especially prior to the worship of a deity, and ritual purity is a state of ritual cleanliness. Ritual purification may ...

, a feature of many religions *

Purity in Buddhism Purity (Pali: ''Vissudhi'') is an important concept within much of Theravada and Mahayana Buddhism, although the implications of the resultant moral purification may be viewed differently in the varying traditions. The aim is to purify the person ...

, a spiritual purity of character or essence

Science

*Purity, the absence of

impurity In chemistry and materials science, impurities are chemical substances inside a confined amount of liquid, gas, or solid, which differ from the chemical composition of the material or compound. Firstly, a pure chemical should appear thermodynam ...

contaminant Contamination is the presence of a constituent, impurity, or some other undesirable element that spoils, corrupts, infects, makes unfit, or makes inferior a material, physical body, natural environment, workplace, etc. Types of contamination Wi ...

s in a substance; for example,

Chemical purity In chemistry, chemical purity is the measurement of the amount of impurities found in a sample. Several grades of purity are used by the scientific, pharmaceutical, and industrial communities. Some of the commonly used grades of purity include: ...

*Purity, the proportion of a named

pure substance A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., wi ...

in a sample (by weight, mass, volume, or count) *

Fineness The fineness of a precious metal object (coin, bar, jewelry, etc.) represents the weight of ''fine metal'' therein, in proportion to the total weight which includes alloying base metals and any impurities. Alloy metals are added to increase hardne ...

, several units of purity of precious metals *

Nine (purity) Nines are an informal, logarithmic notation for proportions very near to one, or equivalently percentages very near 100%. Their common uses include grading the purity of materials. Put simply, "nines" are the number of consecutive nines in a perce ...

, an informal unit of purity *Purity, the

colorfulness Colorfulness, chroma and saturation are attributes of perceived color relating to chromatic intensity. As defined formally by the International Commission on Illumination (CIE) they respectively describe three different aspects of chromatic ...

of a light source *

Purity (quantum mechanics) In quantum mechanics, and especially quantum information theory, the purity of a normalized quantum state is a scalar defined as :\gamma \, \equiv \, \mbox(\rho^2) \, where \rho \, is the density matrix of the state. The purity defines a measure o ...

, a measure of correlation between a system and its environment *

Purity (algebraic geometry) In the mathematical field of algebraic geometry, purity is a theme covering a number of results and conjectures, which collectively address the question of proving that "when something happens, it happens in a particular codimension". Purity of th ...