UFO noun[ C ] uk /ˌjuː.efˈəʊ/ us /ˌjuː.efˈoʊ/ abbreviation for unidentified flying object: an object seen in the sky that is thought to be a spacecraft from another planet: 不明飞行物,飞碟,幽浮(unidentified flying object的缩写) Several UFO sightings have been reported.已接到了数起发现不明飞行物的报告。 Compare
flying saucerold-fashioned KTSDESIGN/SCIENCE PHOTO LIBRARY/GettyImages SMART Vocabulary: related words and phrases Space travel airlock astronaut autopilot biosatellite blast cosmonaut escape velocity EVA flyby launcher rocket science rocket scientist space capsule space probe space shuttle space tourism space tourist spacesuit spacewalk touchdown
UFO | American Dictionary UFO noun[ C ] us/ˌju·efˈoʊ/pluralUFOs abbreviation for unidentified flying object (= an object seen in the sky that some people believe is a spacecraft from another planet) |