(cricket) To get out by deliberately obstructing a fielder in order to prevent him from making a catch or run out, or from gathering the ball (very rare).

(gastroenterology) An obstruction of the intestines which prevents normal digestion.

A bowel obstruction.

Alternative form of pseudoobstruction

present participle of obstruct the field

plural of chronic obstructive pulmonary disease

(pathology) Any of a group of diseases characterized by the pathological limitation of airflow in the airway that is not fully reversible. May be caused by reactive airways, chronic infection, congenital defects, or, most commonly, cigarette smoking. Generally does not include neoplasms, which could also obstruct airways.