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1.
A plan made by Lelouch vi Britainia, that is to set the world into a state of tranquility. the first part of the plan is to get the world to despise you, second conquer the world,third die thus leaving the world united under the hatred of you. once that you die, the world has no need for military because it was united, in other words no war ever again.
Lelouch vi Britainia was killed by Zero thus completing Zero Requiem
by Jason Seraph April 11, 2009
 
2.
A plan set forth by Lelouch Lamperouge that is meant to bring the world peace.

1. Gather the world's hatred to self
2. Die
3. ????
4. Profit
Suzaku kills Lelouch, thus completing Zero Requiem.
by Hallway Kun October 08, 2008
 
3.
To reconcile people who hate each other by making yourself out to be a much greater enemy who they will focus their hate on instead and unite against. Named after a plan made by Lelouch from Code Geass.
Some guy: My family had another major argument again last night.
Another guy: Wow really? Did someone get hurt?
Some guy: No I pulled a Zero Requiem, but that means I won't be able to go home for a while now.
by Psykofreac April 20, 2013
 
4.
Taken from the show Code Geass, In pop culture, this reference may be used to describe someone who is detested by many (including friends) due to a certain situation caused by that individual in which he/she is perceived as an ass, douchebag, bitch, tool, ect. Note that the hate towards this individual can grow to a substantial degree.
Walker: Damn so all our neighbors pretty much hate you right now?

Marcus: Yea not to mention, Federico and he's MY roommate, I think it's safe to say I've entered the Zero Requiem.
by Mr. 28 October 10, 2011