The ceremonial meal held on the first night or two nights of Passover. (noun)
One of the 54 parts into which the Torah is divided. (noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "seder" in a sentence
"If what you take away from a Passover seder is that we’re still pissed about slavery, well then … it’s like coming away from the 4th of July thinking Americans would like nothing better than to shove a firecracker down the throat of Queen Elizabeth’s corgi."
"The seder is a time for deep conversation, meaningful engagement and hopefully inspired action."
"For all the grim events it recounts -- slavery, the Ten Plagues, etc. -- the seder is a celebration of escape and freedom, and as such is a joyous, happy event."