Emptiness 
To dream of emptiness indicates that you sense that there is a void in your life, and that your efforts are meaningless. You have worked hard and have nothing in the way of reward for all of your efforts.
Blankness
Dreaming that you are in a very plain, blank space in a dream symbolizes being lost in waking life. You may not know where to go next or what to do next, and your mind is trying to deal with this situation in your dream by placing you in a blank space. It is normal to experience fear and anxiety in these dreams, and this mirrors your fear and anxiety about what's next for you in waking life.
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