PHANTOM

n. 1 apparition, spectre, ghost, spirit, phantasm, shade, wraith, revenant, vision, Formal eidolon, phantasma, Colloq spook The so-called phantom of the opera turned out to be a real person 2 figment (of the imagination), illusion, delusion, chimera or chimaera, hallucination, fancy, mirage She was a phantom of delight When first she gleamed upon my sight