"coughing" in the noun sense
1. cough, coughing
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
"coughing" in the verb sense
1. cough
exhale abruptly, as when one has a chest cold or congestion
"The smoker coughs all day"
Source: WordNet® (An amazing lexical database of English)
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