(2) What is empty in the dream may be something that symbolizes the self - a room, for example, or house. In that case, it may represent your own (feeling of) emptiness. According to Freud, when a person suppresses or represses something, it often happens that nothing else comes to take the place of what has been suppressed / repressed, and the consequence is that the person’s life becomes empty. (For suppression / repression)
(3) Emptiness, an empty landscape or an empty container, may be a symbol of potentiality: where there is nothing, there is room for anything. The unconscious is sometimes visualized as an empty container, but — again — as containing the potential for all future personal growth. [1]