Definition
The doctrine preventing parties from re-arguing facts that have already been decided in a previous case. It's like judicial recycling—why waste time re-proving something everyone already settled?
Example Usage
Because of collateral estoppel from the criminal trial, we don't need to prove he was at the scene—that's already been established.
Origin
From common law, with 'estoppel' derived from Old French 'estoupail' meaning 'stopper'
Fun Fact
Collateral estoppel is basically res judicata's more specific cousin—res judicata bars whole cases, while collateral estoppel bars specific issues.
Source: Common civil procedure terminology
Related Terms
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See “collateral estoppel” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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