(n.) A stop; an obstruction or bar to one's alleging or denying a fact contrary to his own previous action, allegation, or denial; an admission, by words or conduct, which induces another to purchase rights, against which the party making such admission can not take a position inconsistent with the admission.
ESTOPPEL
Meaning of ESTOPPEL in English
Webster's English dictionary. Английский словарь Webster. 2012