Cough

1. v. i. The more or less frequent repetition of coughing, constituting a symptom of disease.
2. v. i. To expel air, or obstructing or irritating matter, from the lungs or air passages, in a noisy and violent manner.
3. v. t. To expel from the lungs or air passages by coughing; — followed by up; as, to cough up phlegm.
4. v. t. To bring to a specified state by coughing; as, he coughed himself hoarse.
5. v. i. 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.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.