Kol Nidre
Noun
Meaning
the opening prayer on the eve of Yom Kippur
Source: WordNetExamples
Although often regarded as the start of the Yom Kippur evening service—to such a degree that Erev Yom Kippur ("Yom Kippur Evening") is often called "Kol Nidre" (also spelled "Kol Nidrei")—it is technically a separate tradition.
A traditional prayer in Aramaic called Kol Nidre ("All Vows") is traditionally recited just before sunset.
Its name "Kol Nidre" is taken from the opening words, and translates "All vows": All personal vows we are likely to make, all personal oaths and pledges we are likely to take between this Yom Kippur and the next Yom Kippur, we publicly renounce.
Kol Nidre is a prayer that dates back to 9th century Palestine.
Synagogue services on the eve of Yom Kippur begin with the Kol Nidre prayer.
The cantor then chants the Kol Nidre prayer (Aramaic: כל נדרי).