noun
- An (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins.
- synonyms: unidentified flying object, flying saucer
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). ufo. Retrieved September 21, 2026, from http://smartdefine.org/ufo/definitions/1317946 |
| Chicago | WordNet. 2010. "ufo" http://smartdefine.org/ufo/definitions/1317946 (accessed September 21, 2026). |
| Harvard | WordNet 2010, ufo, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/ufo/definitions/1317946>. |
| MLA | WordNet. "ufo" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/ufo/definitions/1317946> |