Cough

(v. i.) To expel air, or obstructing or irritating matter, from the lungs or air passages, in a noisy and violent manner.

Cough - Other Definitions

(v. i.) To expel air, or obstructing or irritating matter, from the lungs or air passages, in a noisy and violent manner.
(v. t.) To expel from the lungs or air passages by coughing; -- followed by up; as, to cough up phlegm.
(v. t.) To bring to a specified state by coughing; as, he coughed himself hoarse.
(v. i.) A sudden, noisy, and violent expulsion of air from the chest, caused by irritation in the air passages, or by the reflex action of nervous or gastric disorder, etc.
(v. i.) The more or less frequent repetition of coughing, constituting a symptom of disease.