cheder

noun, plural cha·da·rim [khuh–dah–rim] /xəˈdɑ rɪm/, English che·ders. Yiddish.

1. heder.

noun plural chadarim (xadaˈriːm) or English cheders Judaism

1. (in Western countries) elementary religious education classes, usually outside normal school hours
2. more traditionally, a full-time elementary religious school
3. informal a place of corrective instruction; prison