'Unnatural' definitions:

Definition of 'unnatural'

From: WordNet
adjective
Not in accordance with or determined by nature; contrary to nature; "an unnatural death"; "the child's unnatural interest in death" [ant: natural]
adjective
Not normal; not typical or usual or regular or conforming to a norm; "abnormal powers of concentration"; "abnormal amounts of rain"; "abnormal circumstances"; "an abnormal interest in food" [syn: abnormal, unnatural] [ant: normal]
adjective
Speaking or behaving in an artificial way to make an impression [syn: affected, unnatural] [ant: unaffected]

Definition of 'Unnatural'

From: GCIDE
  • Unnatural \Un*nat"u*ral\ (?; 135), a. Not natural; contrary, or not conforming, to the order of nature; being without natural traits; as, unnatural crimes. [1913 Webster]
  • Syn: See Factitious. [1913 Webster] -- {Un*nat"u*ral*ly}, adv. -- {Un*nat"u*ral*ness}, n. [1913 Webster]

Synonyms of 'unnatural'

From: Moby Thesaurus