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Noun: unidentified flying object
  1. An (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins
    - UFO, flying saucer

Derived forms: unidentified flying objects

Type of: apparition, fantasm, phantasm, phantasma, phantom, shadow

Encyclopedia: Unidentified flying object

Nearest

unicellular
unicity
Unicode
unicorn
unicorn root
unicuspid
unicycle
unicyclist
unidentifiable
unidentified
unidentified flying object
unidimensional
unidirectional
unifacial
unification
Unification Church
unified
unifier
unifilar
unifoliate
uniform