Contagion

Part of speech: noun (n.)

1. The transmission of a disease from one person to another, by direct or indirect contact.

2. That which serves as a medium or agency to transmit disease; a virus produced by, or exhalation proceeding from, a diseased person, and capable of reproducing the disease.

3. The act or means of communicating any influence to the mind or heart; as, the contagion of enthusiasm. "The contagion of example." Eikon Basilike. When lust . . . Lets in defilement to the inward parts, The soul grows clotted by contagion. Milton.

4. Venom; poison. [Obs.] "I'll touch my point with this contagion." Shak.

Synonyms: See Infection.