noun
ufo
YOO-foh
noun
1
An unidentified flying object — something seen in the sky that cannot be readily explained, often associated with claims of alien spacecraft.
"Witnesses reported a ufo hovering silently over the field."
"The documentary examined dozens of alleged ufo sightings from the 1950s."
How to Use Ufo
Learner’s notesIn plain EnglishSomething spotted in the sky that people can't identify — sometimes assumed to be an alien craft.
Common pairings
ufo sighting
spot a ufo
ufo sightings
Word Forms
ufos plural
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Witnesses reported a _____ hovering silently over the field.