unidentified flying object
The term 'unidentified flying object,' commonly abbreviated as UFO, refers to any aerial object or phenomenon that cannot be immediately identified by the observer.
🇺🇸 US Voice:
🇬🇧 UK Voice:
Definition
B2General
(common)An object or light seen in the sky that cannot be identified as a known object or explained by natural phenomena.
Example
- The pilot reported seeing an unidentified flying object during his flight.
B2Colloquial
(informal)A supposed alien spacecraft.
Example
- Many people believe they have seen an unidentified flying object, thinking it was an alien spaceship.
Similar
Terms that have similar or relatively close meanings to "unidentified flying object":