Open English Wordnet
Adjectives
(a)unnaturalnot in accordance with or determined by nature; contrary to nature“an unnatural death”,
“the child's unnatural interest in death” (a)abnormal, unnaturalnot 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” (a)affected, unnaturalspeaking or behaving in an artificial way to make an impression