extraterrestrial
Definitions
Existing, occurring, or originating outside the limits of the Earth.
A hypothetical or fictional being from outside the Earth or its atmosphere.
Examples
Scientists are constantly scanning the skies for any signs of extraterrestrial life.
The science fiction novel depicts an extraterrestrial civilization that possesses technology far beyond our own.
Synonyms
alien otherworldly non-terrestrial exotic space-born interstellar