Seder

Seder (Hebrew: סדר‎‎; plural: סדרים sedarim) is a Hebrew word meaning "order" or "sequence", and can have any of the following meanings:

For Jewish holidays

• Passover Seder, a ritualized dinner observed during Passover
• A seder for the minor Jewish holiday of Tu Bishvat, modeled on the Passover Seder

In the Hebrew Bible

• A portion of a biblical book in the masoretic text of the Tanakh; this quantitative division is related to the triennial cycle for reading the Torah.
• A colloquial term for the weekly Torah portion in the annual cycle of reading the Torah (in this context often pronounced sidra).

Relating to Talmudic texts

• One of the six orders (major sections) of the Mishnah
• A study session in a daily yeshiva schedule

In Jewish liturgy

• An order of prayers that constitutes a liturgy

In Jewish mysticism

• Seder hishtalshelus, a concept in kabbalah about the nature of God