say it: uhn-NACH-ur-uhl
unnatural is an adjective meaning "not in accordance with or determined by nature; contrary to nature". It carries 3 recorded senses.
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”
speaking or behaving in an artificial way to make an impression
Definitions, synonyms and semantic relations for unnatural come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.