Having native or unaffected simplicity; ingenuous; artless; frank; as, naïve manners; a naïve person; naïve and unsophisticated remarks.
Having a lack of knowledge, judgment, or experience; especially, lacking sophistication in judging the motives of others; credulous; as, a naive belief in the honesty of politicians.
marked by or showing unaffected simplicity and lack of guile or worldly experience; "a teenager's naive ignorance of life"; "the naive assumption that things can only get better"; "this naive simple creature with wide friendly eyes so eager to believe appearances"