Definitions for naiveness
Random House Webster's College Dictionary
having or showing unaffected simplicity of nature; unsophisticated; ingenuous.
having or showing a lack of experience, judgment, or information; credulous.
marked by a simple style reflecting little or no formal training:
Category: Common Vocabulary
not having previously been the subject of a scientific experiment, as an animal.
Category: Laboratory Biology
Origin of naive:
1645–55; < F, fem. of naïf, OF naif natural, instinctive < L nātīvusnative
naivete, naivety, naiveness(noun)
lack of sophistication or worldliness
Lack of sophistication, experience, judgement or worldliness; artlessness; gullibility; credulity.