Dictionaryep•i•dem•icPronunciation: (ep"i-dem'ik), [key] —adj. 1. Also,ep"i•dem'i•cal.(of a disease) affecting many persons at the same time, and spreading from person to person in a locality where the disease is not permanently prevalent. 2. extremely prevalent; widespread. —n. 1. a temporary prevalence of a disease. 2. a rapid spread or increase in the occurrence of something: an epidemic of riots. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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