To dream that you bury something suggests that you are hiding your true feelings. Or you are trying to cover up some situation or act. In particular, if you are burying a body, then it suggests that you are trying to hide something that you find repulsive or that others may find unappealing.
To dream that you are burying a living person signifies emotional turmoil. Alternatively, it suggests that you are being buried by problems and stresses of your waking life.
To dream that you are being buried alive suggests that you are being undermined or stifled in some way. You are feeling trapped or helpless.
Dreaming that you are burying the bones of someone who is living means that there are secrets that this person knows about and you are trying to keep those secrets from coming out.