Webster's Revised Unabridged Dictionary · 1913

Illness

Illness , noun

[From Ill.]

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