extraterrestrial
ek struh tuh re stree uhl
- n a form of life assumed to exist outside the Earth or its atmosphere
 - a  originating or located or occurring outside Earth or its atmosphere
                    
                        
                            
is there extraterrestrial life? 
- Wondering whether extraterrestrial life exists? Tullis Onstott, 53, has found itsort of.
 - A Russian scientific team headed by Lavbin scoured the Tunguska site early in August and breathlessly announced that it had found the remnants of an extraterrestrial spacecraft .
 - All extraterrestrial beings are "bug-eyed monsters," or BEMs, to science-fiction buffs.