Definitions of pure:

• adjective:   used of persons or behaviors; having no faults; sinless

  Example: "I felt pure and sweet as a new baby- Sylvia Plath"

• adjective:   free of extraneous elements of any kind

  Example: "Pure air and water"

• adjective:   not mixed

  Example: "Pure oxygen"

• adjective:   in a state of sexual virginity

  Example: "Pure and vestal modesty"

• adjective:   concerned with theory and data rather than practice; opposed to applied

  Example: "Pure science"

• adjective:   free from discordant qualities
• adjective:   (of color) being chromatically pure; not diluted with white or gray or black