Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun unidentified_flying_object

1 sense of unidentified flying object

Sense 1
unidentified flying object, UFO, flying saucer -- (an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins)
       => apparition, phantom, phantasm, phantasma, fantasm, shadow -- (something existing in perception only; "a ghostly apparition at midnight")