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UFO

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UFO/ˌjuːˌɛfˈoʊ/noun
pluralUFO'sorUFOs/ˌjuːˌɛfˈoʊz/
UFO
/ˌjuːˌɛfˈoʊ/
noun
pluralUFO'sorUFOs/ˌjuːˌɛfˈoʊz/
Learner's definition of UFO  
[count]
: a flying object in the sky that some people believe could be a spaceship from another planet
UFO is as an abbreviation of “unidentified flying object.”
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