symptom
US /ˈsɪmp.təm/
UK /ˈsɪmp.təm/
1.
a physical or mental feature which is regarded as indicating a condition of disease, particularly such a feature that is apparent to the patient.
:
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Fever is a common symptom of the flu.
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He experienced several unusual symptoms before the diagnosis.
2.
a sign of the existence of something, especially something undesirable.
:
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The rising crime rate is a symptom of deeper social problems.
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His constant complaining is a symptom of his unhappiness.