UFO

n. Stands for Unidentified Flying Object. You use this for any object in the sky that cannot be identified, especially one thought to be an alien spaceship.

n. Abbreviation for Unidentified Flying Object. The term is used technically for any unexplained aerial sighting, though in general register it typically implies an extraterrestrial craft.

“The pilot reported seeing a strange silver UFO hovering near the clouds.”

“Declassified documents revealed that many reported UFO sightings during the Cold War were actually secret military test flights.”

n. A project, like a sweater you are knitting, that you started a long time ago but never finished.

n. An acronym for 'Unfinished Object'. Used within hobbyist communities, particularly knitting and quilting, to refer to projects that have been abandoned or left incomplete.

“I have a basket full of UFOs that I really need to finish this winter.”

“The veteran quilter admitted to having dozens of UFOs tucked away in her studio, some dating back nearly a decade.”

Informal · Slang