- 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.
- 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
adj.early 15c., “not in accord with physical nature,” from un- (1) “not” + natural (adj.). Meaning “artificial” is attested from 1746; that of “at variance with moral standards” is from 1520s.