Interpretations of department stores in dreams can indicate an abundance of material possessions or the need for extensive shopping sprees.
Also, department stores may represent latent desires to fulfill one’s needs or desires. Examples might include a lack of fulfillment in the consumer fantasy (need for power, beauty, status). A layered representation could be a place where someone feels they can buy anything they want. Dreams in which a person is actively engaged in shopping likely depict contentment and wish-fulfillment.
There are many interpretations of what a department store may represent when it appears in your dream. If you are working on something big and fulfilling, it’s possible that seeing a department store might represent how much success you achieved during the day. If you feel like there is something missing in your life and visiting a department store, this may mean that even though you have material stuff, you are still feeling unhappy.