alien(pertaining to extraterrestrial life) adjective [UK: ˈeɪ.liən] [US: ˈeɪ.liən]I don't believe in aliens. = No creo en extraterrestres.
extraterrestrenoun {m} {f}
alien [aliens](life form of non-Earth origin) noun [UK: ˈeɪ.liən] [US: ˈeɪ.liən]I don't believe in aliens. = No creo en extraterrestres.
extraterrestrenoun {m}
extraterrestrial [extraterrestrials](being originating from outside of the Earth) noun [UK: ˌek.strə.tə.ˈre.striəl] [US: ˌek.strə.tə.ˈre.striəl]I don't believe in extraterrestrials. = No creo en extraterrestres.
extraterrestre; alienígena adjective
extraterrestrial(originating from outside of the Earth) adjective [UK: ˌek.strə.tə.ˈre.striəl] [US: ˌek.strə.tə.ˈre.striəl]