If you dream of aliens, its dream interpretation is that you face an experience/ event/ something, which is very different and strange to you. You may not be knowing how to handle this. You think of it as an “alien” or weird encounter. This thing may not be out of this world, but the real issue is that you are new to it.
If you’re not your usual self, you might feel strange, or maybe, like an alien. Your mental, emotional and psychological states may trigger a dream about seeing an alien, or being an alien.