purity

[pyoor-i-tee]
noun
1.
the condition or quality of being pure; freedom from anything that debases, contaminates, pollutes, etc.: the purity of drinking water.
2.
freedom from any admixture or modifying addition.
3.
ceremonial or ritual cleanness.
4.
freedom from guilt or evil; innocence.
5.
physical chastity; virginity.
6.
freedom from foreign or inappropriate elements; careful correctness: purity of expression.
7.
Optics. the chroma, saturation, or degree of freedom from white of a given color.
8.
cleanness or spotlessness, as of garments.

Origin:
1175–1225; < Late Latin pūritās (see pure, -ity); replacing Middle English pur(e)te < Anglo-French < Late Latin, as above

hyperpurity, noun
superpurity, noun
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World English Dictionary
purity (ˈpjʊərɪtɪ)
 
n
1.  the state or quality of being pure
2.  physics a measure of the amount of a single-frequency colour in a mixture of spectral and achromatic colours

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

purity
early 13c., from O.Fr. purete, earlier purte (12c.), from L.L. puritatem (nom. puritas) "cleanness, pureness," from L. purus (see pure).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
These virtues were supported by an uncommon spirit of prayer and retirement, and a great purity and innocence of manners.
If purity is desirable eliminate the money and fame.
They are two symbiotic things that when they work together, the purity of truth
  comes out to all who will listen.
TO protect the purity of drinking water, water companies usually try to keep
  the public off the land around their reservoirs.
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