Definitions for yom kippuryɒm ˈkɪp ər, yoʊm; Heb. ˈyɔm kiˈpur
Random House Webster's College Dictionary
Yom Kip•puryɒm ˈkɪp ər, yoʊm; Heb. ˈyɔm kiˈpur(n.)
the holiest Jewish holiday, observed on the 10th day of Tishri by fasting and by recitation of prayers of repentance in the synagogue.
Ref: Also called Day of Atonement.
Origin of Yom Kippur:
< Heb, =yōm day +kippūr atonement
Yom Kippur, Day of Atonement(noun)
(Judaism) a solemn and major fast day on the Jewish calendar; 10th of Tishri; its observance is one of the requirements of the Mosaic law
A particular Jewish holiday, the day of atonement, falling on the tenth day of the Hebrew month of Tishrei.
Origin: From יום כיפור, literally "day of atonement".