Definition(s)
- An indication that a person has a condition or disease. Some examples of symptoms are headache, fever, fatigue, nausea, vomiting, and pain.
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Definition from: Physician Data Query via Unified Medical Language System
at the National Library of Medicine
- Subjective evidence of disease or physical disturbance observed by the patient <headache is a symptom of many diseases> <visual disturbances may be a symptom of retinal arteriosclerosis>; broadly: something that indicates the presence of a physical disorder.
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Definition from: Merriam-Webster's Medical Dictionary
by Merriam-Webster Inc.
Related discussion in the Handbook
See also Understanding Medical Terminology.