1. (noun)naturalness the quality of beingnatural or based on natural principles
"he accepted the naturalness of death"; "the spontaneous naturalness of his manner"
2. (noun)artlessness, innocence, ingenuousness, naturalness the quality of innocentnaivete
3. (noun)naturalness the likeness of a representation to the thing represented
"engineers strove to increase the naturalness of recorded music"
Definition of 'naturalness'
