[ uhn-nach-er-uhl, -nach-ruhl ]
/ ʌnˈnætʃ ər əl, -ˈnætʃ rəl /


contrary to the laws or course of nature.
at variance with the character or nature of a person, animal, or plant.
at variance with what is normal or to be expected: the unnatural atmosphere of the place.
lacking human qualities or sympathies; monstrous; inhuman: an obsessive and unnatural hatred.
not genuine or spontaneous; artificial or contrived: a stiff, unnatural manner.
Obsolete. lacking a valid or natural claim; illegitimate.

Origin of unnatural

late Middle English word dating back to 1375–1425; see origin at un-1, natural


un·nat·u·ral·ly, adverbun·nat·u·ral·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for unnatural

British Dictionary definitions for unnatural

/ (ʌnˈnætʃərəl, -ˈnætʃrəl) /


contrary to nature; abnormal
not in accordance with accepted standards of behaviour or right and wrongunnatural love
uncanny; supernaturalunnatural phenomena
affected or forcedan unnatural manner
inhuman or monstrous; wickedan unnatural crime
obsolete illegitimate

Derived forms of unnatural

unnaturally, adverbunnaturalness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012