alien

1. adjective

1)

an alien landscape

Syn:

unfamiliar, unknown, strange, peculiar; exotic, foreign

Ant:

familiar

2)

a vicious role alien to his nature

Syn:

incompatible with, unusual for, opposed to, conflicting with, contrary to, in conflict with, at variance with, out of step with; rare oppugnant to

Ant:

familiar

3)

alien beings

Syn:

extraterrestrial, unearthly, otherworldly; Martian, Jovian, Venutian

Ant:

earthly

2. noun

1)

an illegal alien

Syn:

foreigner, nonnative, immigrant, emigrant, émigré

2)

the alien's spaceship

Syn:

extraterrestrial, ET; Martian, Jovian, Venutian; informal little green man