from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various unidentified flying objects of presumed extraterrestrial origin, typically described as luminous moving disks.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An unidentified flying object; UFO; usually with disc-like properties.
- n. In fiction, an alien interplanetary vessel with a disc-like shape and generally metallic appearance.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins
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