(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.
(n.) The agency by which the law excludes evidence to dispute certain admissions, which the policy of the law treats as indisputable.
Example Sentences:
(1) Several legal approaches might be used to increase physicians' responsibility for the cost of unnecessary services--expansion of tort law, implied contact, redesign of insurance mechanisms, equitable estoppel and informed consent.
(2) According to Jas Purewal, founder of interactive entertainment law firm Purewal & Partner, there is no time limit on EULA enforcement, "like any contract, they can in theory become more difficult to enforce if there is a lengthy gap between the contract starting and the enforcement beginning, or if the developer says they won’t enforce their rights and then changes their mind after the game buyer has relied on that claim in some concrete way – in the UK, US and other common law countries this is called ‘ estoppel ’.