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