disease

[dih-zeez]
noun
1.
a disordered or incorrectly functioning organ, part, structure, or system of the body resulting from the effect of genetic or developmental errors, infection, poisons, nutritional deficiency or imbalance, toxicity, or unfavorable environmental factors; illness; sickness; ailment.
2.
any abnormal condition in a plant that interferes with its vital physiological processes, caused by pathogenic microorganisms, parasites, unfavorable environmental, genetic, or nutritional factors, etc.
3.
any harmful, depraved, or morbid condition, as of the mind or society: His fascination with executions is a disease.
4.
decomposition of a material under special circumstances: tin disease.
verb (used with object), diseased, diseasing.
5.
to affect with disease; make ill.

Origin:
1300–50; Middle English disese < Anglo-French dese(a)se, disaise; see dis-1, ease

diseasedly, adverb
diseasedness, noun


1. morbidity, complaint, derangement, distemper, indisposition, infirmity, disorder, malady.


1. health. 5. cure.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
disease (dɪˈziːz)
 
n
1.  any impairment of normal physiological function affecting all or part of an organism, esp a specific pathological change caused by infection, stress, etc, producing characteristic symptoms; illness or sickness in general
2.  a corresponding condition in plants
3.  any situation or condition likened to this: the disease of materialism
 
Related: pathological
 
[C14: from Old French desaise; see dis-1, ease]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

disease
early 14c., "discomfort," from O.Fr. desaise, from des- "without, away" (see dis-) + aise "ease" (see ease). Sense of "sickness, illness" first recorded late 14c.; the word still sometimes was used in its lit. sense early 17c. Related: Diseased.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

disease dis·ease (dĭ-zēz')
n.
A pathological condition of a body part, an organ, or a system resulting from various causes, such as infection, genetic defect, or environmental stress, and characterized by an identifiable group of signs or symptoms.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica
Encyclopedia

disease

a harmful deviation from the normal structural or functional state of an organism. A diseased organism commonly exhibits signs or symptoms indicative of its abnormal state. Thus, the normal condition of an organism must be understood in order to recognize the hallmarks of disease. Nevertheless, a sharp demarcation between disease and health is not always apparent

Learn more about disease with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
He had not been complaining of ill health, but no doubt died of heart disease.
Seventy-five percent of us die from cardiovascular disease, cancer, or stroke.
Ten years ago people talked confidently of stopping Alzheimer's disease in its
  tracks.
This fungal disease can be chemically controlled.
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