- a chronic, irreversible disease of the lungs characterized by abnormal enlargement of air spaces in the lungs accompanied by destruction of the tissue lining the walls of the air spaces.
- any abnormal distention of an organ, or part of the body, with air or other gas.
- a condition in which the air sacs of the lungs are grossly enlarged, causing breathlessness and wheezing
- the abnormal presence of air in a tissue or part
