extraterrestrial

US /ˌek.strə.təˈres.tri.əl/
UK /ˌek.strə.təˈres.tri.əl/
1.

người ngoài hành tinh

in or coming from a place outside the planet Earth:

:
In those rocks may lie the best chance of finding extraterrestrial life.
1.

người ngoài hành tinh

a creature from outside the planet Earth:

:
The huge dome looks like a spacecraft belonging to an extraterrestrial.