Cough \Cough\, n. [Cg. D. kuch. See {Cough}, v. i. ] 1. 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. [1913 Webster] 2. The more or less frequent repetition of coughing, constituting a symptom of disease. [1913 Webster] {Stomach cough}, {Ear cough}, cough due to irritation in the stomach or ear. [1913 Webster]