Dyspnea: Difficult or labored breathing; shortness of breath. Dyspnea is a sign of serious disease of the airway, lungs, or heart. The onset of dyspnea should not be ignored; it is reason to seek medical attention. QUESTION COPD (chronic obstructive pulmonary disease) is the same as adult-onset asthma. See Answer From Lung Disease/COPD Resources How I Control My Allergic AsthmaInoperable Lung Cancer Featured Centers What Are the Best PsA Treatments for You?Understanding Biologics 10 Things People With Depression Wish You Knew Health Solutions From Our Sponsors Shot-Free MS Treatment Your Child and COVID-19