To dream of seeing the dead body means that you are trying to finish something important in your life. The death is the symbol of the end. There could be some phase in your waking life you are over with. Sometimes it is the relationships you are not happy with, or sometimes it is the job you are doing and you do not fulfill yourself in it. The dead body could also show the fear you have while losing the ones you love, therefore you see them being dead.
Read more about dreaming of Body, dead in other dream meanings interpretations.