- Estoppel is defined as a legal principle that stops someone from asserting a truth that is defined as contradictory to an already established truth.
If the court has established in a criminal trial that someone is guilty of murder, the legal doctrine preventing the murderer from denying his guilt in a civil trial is an example of estoppel.
Origin of estoppelOld French estoupail, stopper, bung ; from estoper: see estop
Origin of estoppelObsolete French estouppail, from Old French estouper, to stop up, from Vulgar Latin *stuppāre; see stop.
- (law) A legal principle in the law of equity that prevents a party from asserting otherwise valid legal rights against another party because conduct by the first party, or circumstances to which the first party has knowingly contributed, make it unjust for those rights to be asserted.
estoppel - Legal Definition