UFO

Pronunciation (US):

(GB):

 Dictionary entry overview: What does UFO mean? 

• UFO (noun)
  The noun UFO has 1 sense:

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

  Familiarity information: UFO used as a noun is very rare.

 Dictionary entry details 

• UFO (noun)

Sense 1

Meaning:

An (apparently) flying object whose nature is unknown; especially those considered to have extraterrestrial origins

Classified under:

Nouns denoting cognitive processes and contents

Synonyms:

flying saucer; UFO; unidentified flying object

Hypernyms ("UFO" is a kind of...):

apparition; fantasm; phantasm; phantasma; phantom; shadow (something existing in perception only)

 Context examples 

This allele, which encodes tyrosine-protein kinase receptor UFO protein is involved in extracellular matrix signal transduction and cellular proliferation stimulation.

(AXL wt Allele, NCI Thesaurus)

Area 51 has for decades been rumored to be a facility for UFO and extraterrestrials research.

(Millions don't turn up to 'storm' US airbase for extraterrestrial evidence, Wikinews)