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View synonyms for

UFO

[ yoo-ef-ohor, sometimes, yoo-foh ]

abbreviation for

plural UFO's, UFOs.
  1. unidentified flying object: any unexplained moving object observed in the sky, especially one assumed by some observers to be of extraterrestrial origin. Compare UAP ( def ), flying saucer ( def ).


UFO

/ ˈːəʊ /

abbreviation for

  1. unidentified flying object
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

UFO

1
  1. The abbreviation for u nidentified f lying o bject. Sometimes referred to colloquially as “flying saucers.” Most UFO sightings have prosaic explanations; there is no hard evidence that extraterrestrial beings are visiting Earth .

UFO

2
  1. An abbreviation for “ U nidentified F lying O bject.” Often described as “flying saucers,” some UFOs are believed to come from other planets or galaxies and thus support the idea that human beings are not the only form of intelligent life in the universe. Few scientists agree.
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Usage Note

See UAP.
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yvlog History and Origins

Origin of UFO1

First recorded 1950–55
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Example Sentences

Examples have not been reviewed.

Harry Reid, the late Senator and Democratic Majority Leader who made waves in 2021 by calling for the declassification of UFO documents, articulated at the time a non-scientist’s perspective on the subject.

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What has been observed may look like flying saucers but they are actually lenticular clouds, also referred to by some as pancake or UFO clouds.

From

All the worrying got me thinking about the interview I conducted in September with Sean M. Kirkpatrick, who had recently retired as the Pentagon’s chief investigator of UFO reports.

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"John Ratcliffe was just on Fox News talking about UFO Disclosure," writes one person in a post to X, sharing a clip from 2021.

From

Along the highway east of town, you will probably encounter Coyote, a 67-year-old junkyard proprietor with a booming baritone voice and a truck that says “UFO retrieval and repairs.”

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