preternatural UK /ˌpɹiː.təˈnæt͡ʃ.(ə)ɹ.əl/US /ˌpɹi.tɚˈnæt͡ʃ.(ə)ɹ.əl/ adjective2 •Beyond or not conforming to what is natural or according to the regular course of things; strange.I have employed cold air, and very often spongings with cold water, in order to moderate the preternatural heat of the skin, and to check the increased velocity of the circulation. — 1815 •(old-fashioned) Having an existence outside the natural world.Macbeth is like a record of a preternatural and tragical event. — 1817 formsmore preternatural · most preternatural