Flying saucer (abbr.) (3)
I believe the answer is:
ufo
(Other definitions for ufo that I've seen before include "One unexplained overhead" , "Airborne enigma" , "Odd space object" , "Mysterious craft" , "Mysterious sighting" .)
I believe the answer is:
ufo
(Other definitions for ufo that I've seen before include "One unexplained overhead" , "Airborne enigma" , "Odd space object" , "Mysterious craft" , "Mysterious sighting" .)