Definitions:

1. A jewish prayer recited during services, and when mourning the death of a close relative. NOUN
   • The congregation joined together to say the Kaddish, honoring those who had passed away.
2. A significant prayer in Judaism, often associated with mourning and remembrance. NOUN
   • After the passing of his father, he recited the Mourner's Kaddish each day for eleven months.

Synonyms:

• jewish prayer for the dead
• memorial prayer
• mourner's prayer
• prayer of mourning
• prayer of remembrance