v. i. | 1. | To expel air, or obstructing or irritating matter, from the lungs or air passages, in a noisy and violent manner. |
v. t. | 1. | To expel from the lungs or air passages by coughing; - followed by up; as, to cough up phlegm. |
| 2. | To bring to a specified state by coughing; as, he coughed himself hoarse. |
n. | 1. | 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. |
| 2. | The more or less frequent repetition of coughing, constituting a symptom of disease. |