Because lungs are the source of breath, they can represent life. Lungs in a dream can symbolize breathing new life into an idea or a project.
Air is a symbol of the heavens and of spirituality, so a dream about lungs can represent a desire to be more in touch with your spiritual nature.
Because the lungs bring good air into the body and expel bad air from the body, they symbolize the expulsion of negative thoughts and the acceptance of positive ones.
Traditionally, the lungs were thought to be the source of self-knowledge, so if you dream about lungs it can mean that you are learning something new about yourself.
If you dream that your lungs are injured, you are feeling defeated.
Lungs are associated with grief in Chinese medicine.