Originating from outside of the Earth's atmosphere, from space, or from another planet; alien to Earth or its environment
A being originating from outside of the Earth's atmosphere, from space, or from another planet; an alien
Extraterrestrials are living creatures that some people think exist or may exist in another part of the universe. a creature that people think may exist on another planet. relating to things that exist outside the Earth
Extraterrestrial means happening, existing, or coming from somewhere beyond the planet Earth. NASA has started a 10-year search for extraterrestrial intelligence. extraterrestrial rocks