cough

n 1: sudden expulsion of air from the lungs that clears the air

passages; a common symptom of upper respiratory

infection or bronchitis or pneumonia or tuberculosis

[syn: {coughing}]

2: the act of exhaling air suddenly with a noise [syn: {coughing}]

v : exhale abruptly, as when one has a chest cold or congestion;

"The smoker coughs all day"