Definition of Epidemic

This term, in its ordinary and popular meaning, applies to any disease which is widely spread or generally prevailing at a given place and time. Bethlehem Steel Co. v. Industrial Accident Commission, 21 Cal.2d 742, 135 P.2d 153, 157; Martin v. Springfield City Water Co., Mo.App., 128 S.W.2d 674, 679.

That's the definition of Epidemic in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.