(Psychological / emotional perspective)

If we are trapped in a tomb in a dream we may be trapped by fear, pain or old outdated attitudes in our waking life.

If there are bodies in the tomb, these are usually parts of ourselves we have either not developed or have killed off.

If one of those bodies comes alive, the attention we have given to that aspect of our personality has been sufficient to resurrect it, and a little thought will allow us to identify it.