epidemic /ˌɛpɪˈdɛmɪk/noun 4adjective 2forms 3 noun4 •A widespread disease that affects many humans in a population.At that time, the city [Christiania, now Oslo] was in the grip of a cholera epidemic, and victims were dying at the rate of 60 a day. Bradshaw contracted the disease, and died on September 6 [1853]. — 1950 •An occurrence of a disease or disorder in a human population at a frequency higher than that expected in a given time period; an episode of outbreak and subsequent high prevalence. •A heightened occurrence of anything harmful. •(figurative) The spreading of an idea or belief amongst a population. adjective2 •Of, related to, or being an epidemic: a widespread outbreak of disease in humans.The tetany that was epidemic among slaved children was actually the result of severe calcium, magnesium, and vitamin D deficiency caused by chronic malnutrition. — 2008 •(figurative) Like an epidemic: widespread in a bad way.Epidemic hysteria occurred upon the incumbent’s reelection. formsepidemics · more epidemic · most epidemic