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noun, plural UFO's, UFOs.
any unexplained moving object observed in the sky, especially one assumed by some observers to be of extraterrestrial origin.
Also called unidentified flying object.
Compare flying saucer.
Origin:
1950–55; u(nidentified) f(lying) o(bject)
1950–55; u(nidentified) f(lying) o(bject)
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Ufo
is always a great word to know.
So is lollapalooza. Does it mean:
| a stew of meat, vegetables, potatoes, etc. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
Collins
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History
UFO
1953, abbreviation of Unidentified Flying Object, which is attested from 1950. Ufology is first attested 1959.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Cultural Dictionary
UFO [(yooh-ef-oh)]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.
UFO [(yooh-ef-oh)]
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.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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FOLDOC
Computing Dictionary
UFO definition
language(United Functions and Objects) A hybrid functional and object-oriented language designed by John Seargant at Manchester University for general-purpose parallel computation.
To a first approximation, UFO is a strict, higher-order functional language with an object-oriented type system, and strong support for numeric computation in the form of SISAL-style arrays and loops. Parallelism is implicit, and applies at various different levels of granularity, thereby facilitating implementations on a wide range of parallel architectures.
It is planned to run it on a 64 processor KSR machine.
(1996-08-22)
American Heritage
Abbreviations & Acronyms
| UFO unidentified flying object |
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Word Dynamo By Dictionary.com
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