phantom

adj : something apparently sensed but having no physical reality;

"seemed to hear faint phantom bells"; "the amputee's

illusion of a phantom limb"

n 1: an unusual appearing ghostly figure; "we were unprepared for

the apparition that confronted us" [syn: {apparition}, {specter},

{spectre}]

2: something existing in perception only: "a ghostly apparition

at midnight" [syn: {apparition}, {shadow}]