phantom
1. [ noun ] (folklore) a ghostly appearing figure
Synonyms: specter apparition phantasm phantasma spectre
Examples:

"we were unprepared for the apparition that confronted us"

Related terms: spirit Flying_Dutchman
2. [ adjective ] something apparently sensed but having no physical reality
Examples:

"seemed to hear faint phantom bells" "the amputee's illusion of a phantom limb"

Related terms: unreal
3. [ noun ] something existing in perception only
Synonyms: shadow phantasma phantasm apparition
Examples:

: "a ghostly apparition at midnight"

Related terms: illusion ghost flying_dutchman unidentified_flying_object
Similar spelling:   phonation
  pantomime
  phenytoin
  Panton
  pantomimer