What does "preternatural" mean?

Preternatural: Beyond of different from what is natural, or according to the regular course of things, but not clearly supernatural or miraculous; strange; inexplicable; extraordinary; uncommon; irregular; abnormal; as, a preternatural appearance; a preternatural stillness; a preternatural presentation (in childbirth) or labor. This vile and preternatural temper of mind. South.