How do you spell Apparition

Available Definitions:
1)  n. - The act of becoming visible; appearance; visibility.
2)  n. - The thing appearing; a visible object; a form.
3)  n. - An unexpected, wonderful, or preternatural appearance; a ghost; a specter; a phantom.
4)  n. - The first appearance of a star or other luminary after having been invisible or obscured; -- opposed to occultation.