Chronic obstructive lung disease (COLD): Any disorder that persistently obstructs bronchial airflow. COLD mainly involves two related diseases -- chronic bronchitis and emphysema. Both cause chronic obstruction of air flowing through the airways and in and out of the lungs. The obstruction is generally permanent and progresses (becomes worse) over time.
Reviewed on 12/27/2018
CONTINUE SCROLLING FOR RELATED SLIDESHOW