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
In addition to ice cream, The Big Dipper carries a selection of UFO’s, including chocolate chip cookie with vanilla or chocolate ice cream and chocolate wafer cookie with vanilla or chocolate ice cream.
—Pamela Brown, Hartford Courant, 2 Aug. 2025
Written and directed by Michael Gallagher, The Leader tells the unbelievable true story of UFO cult leaders Marshall Herff Applewhite (Nelson) and Bonnie Lu Nettles (Farmiga), who inspired hundreds of people to abandon their families, drop out of society, and prepare to evacuate planet Earth.
—Matt Grobar, Deadline, 30 July 2025
Prior to the 1947 Roswell incident and Area 51’s ensuing cultural ascendency, UFO reports described all kinds of odd aerial vehicles—from zeppelin-like contraptions to streamlined rockets.
—Andrew Paul Jul 30, Popular Science, 30 July 2025
Xian Ming Yu is a nonbinary filmmaker from Queens, New York, whose resume includes being a UFO Short Film Lab filmmaker and a Film at Lincoln Center Artist Academy fellow.
—Chris Gardner, HollywoodReporter, 23 July 2025
See All Example Sentences for UFO
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Pamela Brown, Hartford Courant, 2 Aug. 2025
Written and directed by Michael Gallagher, The Leader tells the unbelievable true story of UFO cult leaders Marshall Herff Applewhite (Nelson) and Bonnie Lu Nettles (Farmiga), who inspired hundreds of people to abandon their families, drop out of society, and prepare to evacuate planet Earth.
—Matt Grobar, Deadline, 30 July 2025
Prior to the 1947 Roswell incident and Area 51’s ensuing cultural ascendency, UFO reports described all kinds of odd aerial vehicles—from zeppelin-like contraptions to streamlined rockets.
—Andrew Paul Jul 30, Popular Science, 30 July 2025
Xian Ming Yu is a nonbinary filmmaker from Queens, New York, whose resume includes being a UFO Short Film Lab filmmaker and a Film at Lincoln Center Artist Academy fellow.
—Chris Gardner, HollywoodReporter, 23 July 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 6 Aug. 2025.
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