Definitions for "Seder"
(lit., "order"): the order of service observed at home on the first two nights of Passover (see *Pesach)
the ceremonial meal on the first two nights of Passover. This is when the 4 cups of wine are drunk, matzo is eaten and the story of the Exodus is retold.
Hebrew for order; the Mishnah is divided into six major sedarim.
Keywords:  amazing, dramatic, audience, sort, lots
an amazing experience, a sort of dramatic acting out complete with symbols and lots of audience participation
Keywords:  friends, gathering, held, family, large
a large gathering of friends and family held
Keywords:  structure
a similar structure