extraterrestrial

01 adj. originating or located or occurring outside Earth or its atmosphere; as, there is no clear evidence for extraterrestrial life.

1.
originating or located or occurring outside Earth or its atmosphere; as, there is no clear evidence for extraterrestrial life.

02 n. a hypothetical form of life existing outside the Earth or its atmosphere, especially intelligent life on other planets or in other solar sy…

1.
a hypothetical form of life existing outside the Earth or its atmosphere, especially intelligent life on other planets or in other solar systems; as, what would you say to an extraterrestrial?.

Syn. extraterrestrial being, alien.