UFO

noun
\ ˌyü-(ˌ)ef-ˈō How to pronounce UFO (audio) , ˈyü-(ˌ)fō\
plural UFO's or UFOs\ ˌyü-​(ˌ)ef-​ˈōz How to pronounce UFOs (audio) , ˈyü-​(ˌ)fōz \

Definition of UFO

: an unidentified flying object especially : flying saucer

First Known Use of UFO

1953, in the meaning defined above

History and Etymology for UFO

unidentified flying object

Keep scrolling for more

Keep scrolling for more

More Definitions for UFO

UFO

noun

English Language Learners Definition of UFO

: a flying object in the sky that some people believe could be a spaceship from another planet

Keep scrolling for more