Pronunciation: (nä-ēv'),[key] —adj. 1. having or showing unaffected simplicity of nature or absence of artificiality; unsophisticated; ingenuous.
2. having or showing a lack of experience, judgment, or information; credulous: She's so naive she believes everything she reads. He has a very naive attitude toward politics. 3. having or marked by a simple, unaffectedly direct style reflecting little or no formal training or technique: valuable naive 19th-century American portrait paintings. 4. not having previously been the subject of a scientific experiment, as an animal. Also,na•ïve'.