What does "purity" mean?

Purity: The condition of being pure. Specifically: (a) freedom from foreign admixture or deleterious matter; as, the purity of water, of wine, of drugs, of metals. (b) Cleanness; freedom from foulness or dirt. "The purity of a linen vesture." Holyday. (c) Freedom from guilt or the defilement of sin; innocence; chastity; as, purity of heart or of life. (d) Freedom from any sinister or improper motives or views. (e) Freedom from foreign idioms, or from barbarous or improper words or phrases; as, purity of style. PURKINJE'S CELLS Pur"kin*je's cells`. Etym: [From J. E. Purkinje, their discoverer.] (Anat.) Large ganglion cells forming a layer near the surface of the cerebellum.