noun, plural UFO's, UFOs.
Origin of UFO
Examples from the Web for ufo
At that point, a sphere lit up, resembling the landing of the UFO in E.T., and the overheard lights descended on the stage.I'm Not Country or Pop. I'm Just Pure Garth Brooks.|David Masciotra|September 10, 2014|DAILY BEAST
Long speculated to be a UFO research center, Burlington has been the subject of rampant conspiracies for decades.
There is a lot of elaborate make-up and costuming, and then a UFO arrives.Punks, UFOs, and Heroin: How ‘Liquid Sky’ Became a Cult Movie|Daniel Genis|June 2, 2014|DAILY BEAST
I must have done a double-take, like the Navy pilot who sees a UFO outside his cockpit.
Not even Dennis Kucinich, who has spoken of his own UFO encounter before, took the deal.Citizen Hearing on Disclosure, a Faux Hearing About Alien Encounters|Josh Dzieza|May 2, 2013|DAILY BEAST
1953, abbreviation of Unidentified Flying Object, which is attested from 1950.
An abbreviation for “Unidentified Flying Object.” Often described as “flying saucers,” some UFOs are believed to come from other planets or galaxies and thus support the idea that human beings are not the only form of intelligent life in the universe. Few scientists agree.
The abbreviation for unidentified flying object. Sometimes referred to colloquially as “flying saucers.” Most UFO sightings have prosaic explanations; there is no hard evidence that extraterrestrial beings are visiting Earth.