Dream symbol: alien
alien, aliens, alienation, alienating

Interpretation:
An alien within a dream often symbolizes an aspect of yourself that is unknown to you or unacknowledged by you
A memory of a dreamtime journey to another dimension
Something unfamiliar or unusual, something that is alien to you
Not belonging, feeling like a misfit or outcast, feeling alienated

See also: abduction, exile, extraterrestrial, science fiction, ufo