Whatever you have experience with, whatever you come into contact with most, and these are the things that you will end up dreaming of. Since there are so many different conceivable dream symbols related to death, things such as a dead corpse or a dead ghost may show up together often, but each symbol has its own separate level of importance.
Dreaming of a dead corpse means that you need to worry about the fears in your life. Death and corpses represent some of our greatest fears out there and seeing them so much in your dreams can make it difficult for you to actually see them normally. You need to come to terms with your fears and you also need to make sure that they do not overtake you and you are not consumed with fear over nothing. This is important in many different ways and if you want to see any change then you need to make sure that you are no longer feeling left out and no longer feeling afraid over nothing.
Dreaming of a dead ghost means that you are thinking about your past and all of the ghosts in your closet. You are worried about what might happen if you move on in happiness when you leave a lot of sadness behind you. This dream is a warning that your past will come back to haunt you, and that even though you have moved on, you can never really forget your past. You will eventually see that you can try as hard as you might but you will never be able to totally escape it. You need to embrace your past and stop trying to forget about it.