If the dreamer is lost, there is a department in his life in which he has “lost his way.” Look to other symbols in the dream to judge which department this is.
If in the dream he finds his way, all should be well. But if he awakens before he finds himself, he should probably seek outside help with regard to the matter in question.
If an object is lost, or a beloved friend or pet, the dreamer needs to assess what that object or being, and the loss thereof, means to him.
For example: A dream of losing one’s wallet could mean fear of financial loss. Look to other symbols in the dream to find ways to avoid what one fears.
Astrological parallels: Neptune, Pisces Tarot parallel: The Moon