1. A person who practices a philosophy of naturism expressed nakedness in connection with natural life and prefers to live without clothes, for reasons of health, ecology, religion and/or ethics
2. One who believes that it is good and healthy to wear no clothes, or the activity of doing this: ¹Urban Dictionary – naturist
3. A person who likes being naked in nature.

Also see naturism, nudist, nudism

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References

• 1
  Urban Dictionary – naturist