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

2. (v. t.) To expel from the lungs or air passages by coughing; -- followed by up; as, to cough up phlegm.

3. (v. t.) To bring to a specified state by coughing; as, he coughed himself hoarse.

4. (n.) 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.

5. (n.) The more or less frequent repetition of coughing, constituting a symptom of disease.

Aqua-Lung artificial respiration aspiration asthmatic wheeze blow breath breath of air breathe breathe hard breathe in breathe out breathing broken wind exhalation exhale exhaust expel expiration expire exsufflation gasp gulp hack hiccup huff inhalation inhalator inhale inspiration inspire insufflation iron lung mouth-to-mouth resuscitation oxygen mask oxygen tent pant puff respiration respire scuba sigh sneeze sniff sniffle snore snoring snort snuff snuffle sternutation stertor suspiration wheeze wind