The meaning of dreaming about emptiness is that something is missing or locked in your life. The dream symbolizes fruitless labor, emotional emptiness or loneliness. There is nothing to show all the efforts you have made for a project or a relationship. Especially, if you dream that a container is empty, the interpretation is related to optimism.
You may look in dreams interpretation for other symbols :
End : The meaning of dreaming about the end of something represents an achievement or a goal that was reached. The dream may also mean that hard times are coming ... >tml">
Enemy : If you are dreaming about your enemy, the dream's interpretation is that there are opposed ideas and contradictory attitudes. You're in denial about something ...