Cough v. i. [imp. & p. p. Coughed p. pr. & vb. n. Coughing.] To expel air, or obstructing or irritating matter, from the lungs or air passages, in a noisy and violent manner.
n 1: the act of exhaling air suddenly with a noise [syn: cough]
2: 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: cough]