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 Sci-Fi Fantasy group, sponsored by the Connecticut chapter of the Mutual UFO Network generally meets in restaurants or bars.
—Christopher Arnott, Hartford Courant, 4 May 2025
Those who cast a casual early evening gaze toward Sirius these next couple of weeks might mistake it for a distant drone or even a UFO.
—Joe Rao, Space.com, 25 Apr. 2025
The Green Ray This East Nashville indie bookstore features a mural of a UFO on the side.
—Eva Fedderly, Architectural Digest, 18 Apr. 2025
The incident drew national attention in 2017, exposing previously unknown programs within the Department of Defense relating to UFO research.
—Julia Bonavita, FOXNews.com, 17 Apr. 2025
See All Example Sentences for UFO
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Christopher Arnott, Hartford Courant, 4 May 2025
Those who cast a casual early evening gaze toward Sirius these next couple of weeks might mistake it for a distant drone or even a UFO.
—Joe Rao, Space.com, 25 Apr. 2025
The Green Ray This East Nashville indie bookstore features a mural of a UFO on the side.
—Eva Fedderly, Architectural Digest, 18 Apr. 2025
The incident drew national attention in 2017, exposing previously unknown programs within the Department of Defense relating to UFO research.
—Julia Bonavita, FOXNews.com, 17 Apr. 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 24 May. 2025.
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