Illness \Ill"ness\, n. [From Ill.]

1. The condition of being ill, evil, or bad; badness; unfavorableness. [Obs.]

``The illness of the weather.'' --Locke.

2. Disease; indisposition; malady; disorder of health; sickness; as, a short or a severe illness.

3. Wrong moral conduct; wickedness. --Shak.

Syn: Malady; disease; indisposition; ailment.

Usage: Illness, Sickness. Within the present century, there has been a tendency in England to use illness in the sense of a continuous disease, disorder of health, or sickness, and to confine sickness more especially to a sense of nausea, or ``sickness of the stomach.''

Source: Webster's Revised Unabridged Dictionary (1913)