Yom Kippur[yäm′ki po̵or′, yôm′-, -kip′ər]
Origin: Heb yom-kipur from yom, day plush kipur from kiper, atone from root kpr, deny, disavow
Used by arrangement with John Wiley & Sons, Inc.
Origin: Hebrew yôm kippûr : yôm, day; see ywm in Semitic roots + kippûr, atonement (from kippēr, to cover, atone; see kpr1 in Semitic roots).
Yom Kippur - Cultural Definition
In Judaism, the Day of Atonement, the most important religious holiday; a day of fasting to atone for sins. It comes in autumn. (See Rosh Hashanah.)