To dream about somebody that has recently died can be a symbol for your mourning of them and your subconscious is learning to say goodbye. If the dead is encouraging you to go with them this is a sign that you are struggling to understand why they had to leave and you are still coming to terms with their death.
To dream about someone that has been dead a long time can signify that you miss certain qualities in your current life that their personalities represented to you. Alternatively a relationship with someone else may be reminding you of your relationship with the dead person and there is a lesson to be learned from your previous relationship.
If you dream about a dead sibling or a close friend this shows that you are missing them and wish they were here. You are trying to take yourself back to a happier time or the dream world is the only time where your guard is down and you let yourself come to terms with your loss.
Another interpretation of this dream could be that you are looking for clues in your memories with the dead person to help you in a current situation which is causing you concern.
Are there any significant objects in the dream which could relate to your waking life? Think about what you and the dead person are talking about or doing and this might help you identify how to use these memories to help your current situation.
Dreaming of a child that you have lost shows that you are still trying to keep the child alive in your dreams. Losing anyone is difficult but losing a child can be very traumatic and can be very difficult to come to terms with.
Your dreams show that your subconscious is trying to understand why your child was taken and how to continue being the person you are without them.
If the person you dream about being dead is still alive in real life this can show that you don’t trust them and you feel that they are leading you astray. It may be a sign to reevaluate your friendship with this person and your subconscious is warning you that it might be better if they weren’t around.
Alternatively it could be a reminder to get in contact with someone that you have not seen in a while, it is as if they are dead and you miss them so if they are still alive you can rekindle your relationship with them.