Definition of contagion

• n. - The transmission of a disease from one person to another, by direct or indirect contact.
• n. - 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.
• n. - The act or means of communicating any influence to the mind or heart; as, the contagion of enthusiasm.
• n. - Venom; poison.