名詞 epidemic:

1. a widespread outbreak of an infectious disease; many people are infected at the same time

形容詞 epidemic:

1. (especially of medicine) of disease or anything resembling a disease; attacking or affecting many individuals in a community or a population simultaneously

1. A flu epidemic raged through the school for weeks.
   流感在這所學(xué)校里蔓延了幾個(gè)星期。
2. The village is suffering from a cholera epidemic.
   這個(gè)村莊正流行霍亂。
3. A usually fatal epidemic disease, especially bubonic plague.
   瘟疫通常指一種致命的傳染病，尤指淋巴腺鼠疫
4. Football hooliganism is now reaching epidemic proportions.
   足球比賽中恣意鬧事現(xiàn)在已經(jīng)達(dá)到愈演愈烈的地步。
5. There has recently been an epidemic of crime in our major cities.
   近來我們一些大城市中罪案頻繁。
6. I have an influenza epidemic.
   我得了流行性感冒。

ep.i.dem.ic

adj.（形容詞）
Spreading rapidly and extensively by infection and affecting many individuals in an area or a population at the same time:
流行性的：能夠在一個(gè)地區(qū)或人群中迅速廣泛地蔓延：
例句：
an epidemic outbreak of influenza.
流行性感冒的爆發(fā)性蔓延

Widely prevalent:
極為盛行的：
例句：
epidemic discontent.
普遍流行的不滿情緒

n.（名詞）
An outbreak of a contagious disease that spreads rapidly and widely.
流行：傳染病的迅速廣泛傳播和蔓延
A rapid spread, growth, or development:
迅速的傳播、生長或發(fā)展：
例句：
an unemployment epidemic.
迅速擴(kuò)散的失業(yè)

來源：
French épidémique
法語 épidémique
from épidémie [an epidemic]
源自 épidémie [流行病]
from Old French espydymie
源自 古法語 espydymie
from Medieval Latin epidômia
源自 中世紀(jì)拉丁語 epidômia
from Greek [prevalence of an epidemic disease]
源自 希臘語 [流行病的流行]
from epidômos [prevalent]
源自 epidômos [流行]
epi- [epi-]
epi- [前綴，表.在…之間，前.]
dômos [people] * see d3-
dômos [人們] *參見 d3-

【引伸】
ep.idem.ically
adv.（副詞）