Un·nat·u·ral a. Not natural; contrary, or not conforming, to the order of nature; being without natural traits; as, unnatural crimes.
Syn: -- See Factitious.
-- Un*nat*u*ral*ly, adv. -- Un*nat*u*ral*ness, n.
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unnaturalness
n : the quality of being unnatural or not based on natural
principles [ant: naturalness]