Definition of UFO
UFO's
orUFOs
play \ˌyü-(ˌ)ef-ˈōz\: an unidentified flying object; especially : flying saucer
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Origin and Etymology of ufo
unidentified flying object
First Known Use: 1953
UFO Defined for English Language Learners
UFO
playDefinition of UFO for English Language Learners
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: a flying object in the sky that some people believe could be a spaceship from another planet
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See words that rhyme with UFO Spanish Central: Translation of UFO Nglish: Translation of UFO for Spanish speakers Britannica English: Translation of UFO for Arabic speakers Britannica.com: Encyclopedia article about UFO
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