According to Osho, recurring dreams of dying signal that the old, heavy layers of unfinished, repressed life are dropping; a psychological 'death' that makes you lighter, almost angelic. Heaviness comes from unlived and unexpressed experiences; when they are completed or catharted, the past falls away (nirjara), gravitation loosens, and a new, graceful life arises. Allow it; cooperate by consciously unburdening.
Your death-dreams mean the old you is being cleaned out so a lighter, freer you can be born—let go of pent-up feelings so the past can drop.