phantom

n. type of American bomber jet

adj. illusory, imaginary, unreal

n. spirit, ghost, demon; hallucination, illusion, product of the imagination

Phantom can refer to any of the following.
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Noun
1. a ghostly appearing figure; "we were unprepared for the apparition that confronted us"
(synonym) apparition, phantasm, phantasma, specter, spectre
(hypernym) spirit, disembodied spirit
(hyponym) Flying Dutchman
2. something existing in perception only; "a ghostly apparition at midnight"
(synonym) apparition, phantasm, phantasma, shadow
(hypernym) illusion, semblance
(hyponym) unidentified flying object, UFO, flying saucer
Adjective
1. something apparently sensed but having no physical reality; "seemed to hear faint phantom bells"; "the amputee's illusion of a phantom limb"
(similar) unreal

n. phantom, spirit, ghost, demon; hallucination, illusion, product of the imagination

(n.)
That which has only an apparent existence; an apparition; a specter; a phantasm; a sprite; an airy spirit; an ideal image.