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
Prior to the series launch, Manga Productions also released the game UFO Robot Grendizer: The Feast of the Wolves in MENA in cooperation with the French company Microids.
—Melanie Goodfellow, Deadline, 11 June 2025
Featuring kicky period tunes and fantastic production design, the film stars Jason Schwartzman, Scarlett Johansson and others as parents of talented kids who gather for a science convention and are quarantined by the government when a UFO shows up.
—Brian Truitt, USA Today, 5 June 2025
Trump vows greater transparency President Donald Trump has famously been a UFO skeptic.
—Devin Dwyer, ABC News, 4 June 2025
Over the course of Steven Spielberg's movie, UFO sightings, toys coming to life, and visions of Devils Tower in Wyoming (subsequently recreated in mashed potato) gradually evolve into something more spectacular.
—Richard Edwards, Space.com, 3 June 2025
See All Example Sentences for UFO
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Melanie Goodfellow, Deadline, 11 June 2025
Featuring kicky period tunes and fantastic production design, the film stars Jason Schwartzman, Scarlett Johansson and others as parents of talented kids who gather for a science convention and are quarantined by the government when a UFO shows up.
—Brian Truitt, USA Today, 5 June 2025
Trump vows greater transparency President Donald Trump has famously been a UFO skeptic.
—Devin Dwyer, ABC News, 4 June 2025
Over the course of Steven Spielberg's movie, UFO sightings, toys coming to life, and visions of Devils Tower in Wyoming (subsequently recreated in mashed potato) gradually evolve into something more spectacular.
—Richard Edwards, Space.com, 3 June 2025
See All Example Sentences for UFO
Cite this Entry
“UFO.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/UFO. Accessed 2 Jul. 2025.
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