apparition

(noun) a ghostly appearing figure. Synonyms: phantom, phantasm, phantasma, fantasm, specter, spectre. Example: "We were unprepared for the apparition that confronted us."

(noun) the appearance of a ghostlike figure. Example: "I was recalled to the present by the apparition of a frightening specter."

(noun) something existing in perception only. Synonyms: phantom, phantasm, phantasma, fantasm, shadow. Example: "A ghostly apparition at midnight."

(noun) an act of appearing or becoming visible unexpectedly. Example: "Natives were amazed at the apparition of this white stranger."