phantasm

Synonyms:

apparition, fantasm, phantasma, phantom, shadow

Types:

UFO, flying saucer, unidentified flying object

an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins

Flying Dutchman

a phantom ship that is said to appear in storms near the Cape of Good Hope

ghost, shade, specter, spectre, spook, wraith

a mental representation of some haunting experience

Type of:

illusion, semblance

an erroneous mental representation

Synonyms:

apparition, fantasm, phantasma, phantom, specter, spectre

Types:

Flying Dutchman

the captain of a phantom ship (the Flying Dutchman) who was condemned to sail against the wind until Judgment Day

Type of:

disembodied spirit, spirit

any incorporeal supernatural being that can become visible (or audible) to human beings