estoppel

[ e-stop-uh l ]
/ ɛˈstɒp əl /

noun Law.

a bar or impediment preventing a party from asserting a fact or a claim inconsistent with a position that party previously took, either by conduct or words, especially where a representation has been relied or acted upon by others.

Origin of estoppel

First recorded in 1575–85, estoppel is from the Middle French word estoupail stopper. See estop, -al2
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British Dictionary definitions for estoppel

estoppel
/ (ɪˈstɒpəl) /

noun

law a rule of evidence whereby a person is precluded from denying the truth of a statement of facts he has previously assertedSee also conclusion

Word Origin for estoppel

C16: from Old French estoupail plug, from estoper to stop up; see estop
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012