RoboTimbo,
There is nothing irrelevant about the quote I picked regardless of its age or other definitions. It's one of many supporting definitions found in the history and evolution of the term UFO. You just choose to ignore the fact that the word UFO is meant to convey the idea of an alien craft, usually of extraterrestrial origin and used synonymousyly with phrases like "flying saucer" ... also believed to be craft of alien origin. I don't know why you even bother to deny it anymore. It must have something to do with the entertainment value. To avoid breaking with tradition here are another couple of quotes:
UFO ( Oxford English Dictionary )
An unidentified flying object; a ‘flying saucer’.
Flying Saucer: ( Encarta Dictionary )
disk-shaped UFO: a disk-shaped flying object believed to be an extraterrestrial spacecraft.
It can't be unidentified if you effen identify it.