WordWeb Online

1. The quality of being natural or based on natural principles
   "he accepted the naturalness of death"; "the spontaneous naturalness of his manner"
    
2. The quality of innocent naiveté
   - artlessness, innocence, ingenuousness
    
3. The likeness of a representation to the thing represented
   "engineers strove to increase the naturalness of recorded music"

See also: natural, unnatural

Type of: alikeness [rare], likeness, naiveness, naiveté, naïveté, naivety, quality, similitude

Antonym: unnaturalness

Encyclopedia: Naturalness