Flying saucer Meaning, Definition & Usage

  1. noun an (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins
    unidentified flying object; UFO.

WordNet


Definitions
  1. a type of Unidentified Flying Object, having a biconvex discoid shape; such objects are occasionally reported to have been sighted, but no example of one has been reliably shown to exist. They are believed by ufologists to originate in outer space, but they are generally presumed to be misinterpretations of ordinary phenomena, illusions or imaginary objects. Fraudulent photographs purporting to show flying saucers are published from time to time.

Webster 1913