The end of a phase in some area of your life.
The physical body in general, or the idea that it’s just a physical “shell” in which a person lives during the course of their life.
If the body is someone you know, perhaps you consider that person to be reaching the end of a phase before beginning a new one, or perhaps you’re afraid of that person dying or becoming less unavailable to you (or at least not available to you in same way as before).
See Also: Dead Acquaintance, Ending, Dying, Death of a Loved One, Ghost, Coffin
[1]To see a dead body in a dream can be symbolic of spiritual death or someone who has been attacked by Satan, Ps. 110:6
[2]