Definition

A type of disease that affects the lungs and other parts of the respiratory system. Lung disorders may be caused by infection, by smoking tobacco, or by breathing in secondhand tobacco smoke, radon, asbestos, or other forms of air pollution. Lung disorders include asthma, chronic obstructive pulmonary disease (COPD), pulmonary fibrosis, pneumonia, and lung cancer. Also called pulmonary disease and respiratory disease.