Seeing a dead relative in a dream is generally a sign that the dreamer feels guilt, regret or angst because of the person's passing. Some interpretations of the dream also hold that the deceased person in the dream is a sign of changes in life or unexpected news.
Seeing a dead relative in a dream can also mean that the soul of the departed has not found peace yet. Another interpretation is if the dead person comes back to life, then something that has been lost will be returned. This can be a person's social status, possessions or even money. A final interpretation is that to dream of a dead relative prior to a wedding serves as the dead person's warning for the union not to take place.