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Definition of Illness
1. Noun. Impairment of normal physiological function affecting part or all of an organism.
Specialized synonyms: Condition, Ague, Amyloidosis, Anuresis, Anuria, Catastrophic Illness, Collapse, Prostration, Aeroembolism, Air Embolism, Bends, Caisson Disease, Decompression Sickness, Gas Embolism, Food Poisoning, Gastrointestinal Disorder, Lead Poisoning, Plumbism, Saturnism, Disease, Hypermotility, Indisposition, Ozone Sickness, Toxaemia, Toxaemia Of Pregnancy, Toxemia, Toxemia Of Pregnancy, Growth
Generic synonyms: Health Problem, Ill Health, Unhealthiness
Derivative terms: Ill, Sick, Unwell
Antonyms: Wellness, Wellness
Definition of Illness
1. n. The condition of being ill, evil, or bad; badness; unfavorableness.
Definition of Illness
1. Noun. An instance of a disease or poor health. ¹
2. Noun. A state of bad health or disease. ¹
¹ Source: wiktionary.com
Definition of Illness
1. sickness [n -ES] - See also: sickness
Medical Definition of Illness
1. 1. The condition of being ill, evil, or bad; badness; unfavorableness. "The illness of the weather." 2. Disease; indisposition; malady; disorder of health; sickness; as, a short or a severe illness. 3. Wrong moral conduct; wickedness. 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." Synonym: Malady, disease, indisposition, ailment. Origin: From Ill. Source: Websters Dictionary (01 Mar 1998)