unidentified flying object

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unidentified flying object

Where it comes from

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.

noun unidentified flying objects

  1. Anything not readily explainable appearing to move through or be suspended in the air. The lights seen over the city last night, originally termed unidentified flying objects, turned out to be spotlights from a car dealership reflecting on low clouds.

    Similar: UFO, UAP, unidentified aerial phenomenon, unexplained aerial phenomenon

  2. Such things as seem to be discrete objects and comparable to aircraft. She said that the unidentified flying object then turned around, zoomed to a higher altitude, and loitered briefly before speeding off.

    Similar: UFO, UAP, unidentified aerial phenomenon, unexplained aerial phenomenon

  3. colloquial An alien spacecraft. He said that the strange beings then took him aboard their unidentified flying object and examined his body.

Translations

Every language

noun anything in the air not readily explainable

Españolobjeto volador no identificado, OVNI, ovni
한국어미확인비행물체 mihwaginbihaengmulche
日本語UFO Yūfō, 未確認飛行物体 mikakunin-hikō-buttai
中文不明飛行物 /不明飞行物 bùmíng fēixíngwù, 飛碟 /飞碟 fēidié, 幽浮 yōufú
हिन्दीउड़न तश्तरी uṛan taśtarī
Portuguêsobjeto voador não identificado, OVNI, óvni
Françaisobjet volant non-identifié, OVNI, ovni
Deutschunidentifiziertes Flugobjekt, UFO
Italianooggetto volante non identificato, OVNI, ovni, UFO, ufo
Ελληνικάάγνωστης ταυτότητας ιπτάμενο αντικείμενο ágnostis taftótitas iptámeno antikeímeno, ΑΤΙΑ ATIA
Românăobiect zburător neidentificat
Русскийнеопо́знанный лета́ющий объе́кт neopóznannyj letájuščij obʺjékt, НЛО NLO
Tiếng Việtvật thể bay không xác định, vật thể bay chưa xác định
العربيةصَحْن طَائِر ṣaḥn ṭāʔir

noun colloquial: an alien spacecraft

日本語UFO Yūfō, 宇宙船 uchūsen, 空飛ぶ円盤 sora tobu enban
中文飛碟 /飞碟 fēidié
ΕλληνικάΑΤΙΑ ATIA
Русскийлета́ющая таре́лка letájuščaja tarélka, НЛО NLO

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Cite this
MLA

"unidentified flying object." Wiktionary, via Micwyn, micwyn.com/word/unidentified%20flying%20object. Accessed 6 Nov. 2026.

APA

unidentified flying object. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/unidentified%20flying%20object

Chicago

"unidentified flying object." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/unidentified%20flying%20object.

BibTeX
@misc{unidentified_flying_object_2026,
  title = {unidentified flying object},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/unidentified%20flying%20object},
  urldate = {2026-11-06}
}