UFO
noun
ˌyü-(ˌ)ef-ˈō 
ˈyü-(ˌ)fō
plural UFO's or UFOs
ˌyü-(ˌ)ef-ˈōz
ˈyü-(ˌ)fōz
: a mysterious flying object in the sky that is sometimes assumed to be a spaceship from another planet : unidentified flying object
"All right." The President sighed. "Is there anybody around this table who thinks UFOs and this signal from Vega have anything to do with each other?"—
Carl Sagan
Carl SaganIn 1966, the first UFO "abduction" was described in journalist John G. Fuller's book The Interrupted Journey.—Keay Davidson
Keay Davidsoncalled also UAP, unidentified aerial phenomenon, unidentified anomalous phenomenon
Examples of UFO in a Sentence
Recent Examples on the Web
The first reactions have landed for Steven Spielberg‘s mysterious UFO thriller Disclosure Day.
—James Hibberd, HollywoodReporter, 27 May 2026
That congressional hearing marked the beginning of a cultural shift in which UFO reports are increasingly treated as a matter for serious discussion, both within the government and the scientific community.
—Kai James, The Conversation, 26 May 2026
The revelation does not come as a surprise to experts within the UFO disclosure movement.
—Julia Bonavita, FOXNews.com, 25 May 2026
Kevin Knight made the save, but then turned heel with a UFO Splash on Darby.
—Alfred Konuwa, Forbes.com, 24 May 2026
See All Example Sentences for UFO
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James Hibberd, HollywoodReporter, 27 May 2026
That congressional hearing marked the beginning of a cultural shift in which UFO reports are increasingly treated as a matter for serious discussion, both within the government and the scientific community.
—Kai James, The Conversation, 26 May 2026
The revelation does not come as a surprise to experts within the UFO disclosure movement.
—Julia Bonavita, FOXNews.com, 25 May 2026
Kevin Knight made the save, but then turned heel with a UFO Splash on Darby.
—Alfred Konuwa, Forbes.com, 24 May 2026
See All Example Sentences for UFO
Cite this Entry
“UFO.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/UFO. Accessed 30 May. 2026.
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