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Definition of UFO
1. Noun. An (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins.
Exact synonyms: Flying Saucer, Unidentified Flying Object
Generic synonyms: Apparition, Fantasm, Phantasm, Phantasma, Phantom, Shadow
Generic synonyms: Apparition, Fantasm, Phantasm, Phantasma, Phantom, Shadow
Definition of UFO
1. Initialism. unidentified flying object ¹
2. Noun. An unidentified flying object. ¹
3. Noun. (informal) An alien spacecraft. ¹
4. Noun. A UFO. ¹
¹ Source: wiktionary.com
Definition of UFO
1. an unidentified flying object [n -S]