出典:Wiktionary
出典:『Wiktionary』 (2026/02/03 18:47 UTC 版)
The phrase is usually attributed to US Air Force officer Edward J. Ruppelt (1923–1960) who coined it as a replacement of the terms flying saucer and flying disk.
unidentified flying object (plural unidentified flying objects)
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an unidentified flying object
an unidentified (and possibly enemy) aircraft
a person who attempts to track down an unidentified flying object
an (apparently) flying object whose nature is unknown
an aircraft that has no tail
an object that flies in the air
An aeroplane lands in safety.