DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   cough
       n 1: a sudden noisy 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, coughing]
       v 1: exhale abruptly, as when one has a chest cold or
            congestion; "The smoker coughs all day"