ufo
/ˌjuːɛfˈoʊ/
noun
- An unidentified flying object; any object seen in the sky that cannot be immediately identified, often associated with claims of extraterrestrial spacecraft.
- Many people claim to have seen a UFO, but most sightings have a logical explanation.
- The pilot reported a UFO on the radar, but it turned out to be a weather balloon.
- The documentary explored famous UFO sightings from the past fifty years.