Originally Posted by BadCompany

dis·ease
n.
1. A pathological condition of a part, organ, or system of an organism resulting from various causes, such as infection, genetic defect, or environmental stress, and characterized by an identifiable group of signs or symptoms.
2. A condition or tendency, as of society, regarded as abnormal and harmful.
3. Obsolete Lack of ease; trouble.


disease [dɪˈziːz]
n
1. (Medicine / Pathology) 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


disease /dis·ease/ (dĭ-zēz´) any deviation from or interruption of the normal structure or function of any body part, organ, or system that is manifested by a characteristic set of symptoms and signs and whose etiology, pathology, and prognosis may be known or unknown.


dis·ease
[dih-zeez] Show IPA noun, verb, -eased, -eas·ing.
–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.