also: ユー・エフ・オー
UFO; unidentified flying object
Standard term for an unidentified flying object; used in both casual and formal contexts.
Last night I saw something like a UFO in the sky.
Many people say they witnessed a UFO glowing in the night sky.
He claims to have taken a photo of a UFO.
Suddenly, a UFO appeared in the sky.
He believes he encountered a UFO in the forest.
Used because a UFO is treated like an aircraft or vehicle, the same way as 飛行機 (airplane).
Standard abbreviation written in full-width Latin letters; the most common written form.
Spelled-out reading of the letters U-F-O; rarely used in practice.
Loanword from English 'UFO', an acronym for 'unidentified flying object'.