1. a Jewish ceremonial dinner held on the first night or first two nights of Passover

Examples

• Our family gathers every year for the Passover seder.
• The seder includes reading from the Haggadah and eating symbolic foods.
• She prepared matzo ball soup for the seder meal.
• The children asked the four questions during the seder.
• We invited our neighbors to join us for seder this year.
• The seder plate contains bitter herbs, charoset, and other traditional items.