Dreaming of an alien or aliens means you think someone is invading your personal boundaries.
If you dream that you are an alien, it symbolizes the undiscovered part of yourself. Dreams of this nature also symbolizes your creative ideas and wild imagination.
They may also be your way of “escaping” from reality.
To dream that you are being abducted by aliens indicates your fears that your surroundings are going to change, or your fear of losing your home and family. You might feel that your space and/or privacy is being invaded.