Webster's Revised Unabridged Dictionary · 1913

Cough

Cough (k?f) , intransitive verb

[Compare Dutch kuchen, Middle High German k{not transcribed}chen to breathe, German keuchen to pant, and English chincough, the first part of which is prob. akin to cough; compare also English choke.]

To expel air, or obstructing or irritating matter, from the lungs or air passages, in a noisy and violent manner.

Cough , transitive verb

1.
To expel from the lungs or air passages by coughing; -- followed by up; as, to cough up phlegm.
2.
To bring to a specified state by coughing; as, he coughed himself hoarse.
Collocations (1)
To cough down , to silence or put down (an objectionable speaker) by simulated coughing.

Cough , noun

[Cg. Dutch 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.
2.
The more or less frequent repetition of coughing, constituting a symptom of disease.
Collocations (1)
Stomach cough or Ear cough , cough due to irritation in the stomach or ear.