A doctrine of law that stops a person from later denying facts which the person once acknowledged as true, and that others took to be true in good faith.  A person who signs a contract stating he will pay $10,000 cannot later argue he only owes $5,000 under estoppel.
Related information about estoppel:
- Estoppel - Wikipedia, the free encyclopedia
 Estoppel in its broadest sense is a legal term referring to a series of legal and   equitable doctrines that preclude "a person from denying or asserting anything to ...
 
- Estoppel in English law - Wikipedia, the free encyclopedia
 Estoppel in English law. From Wikipedia, the free encyclopedia. Jump to:   navigation, search. Estoppel in English law is a doctrine that may be used in   certain ...
 
- estoppel - Legal Dictionary - The Free Dictionary
 A legal principle that bars a party from denying or alleging a certain fact owing to   that party's previous conduct, allegation, or denial. The rationale behind ...
 
- Estoppel | Define Estoppel at Dictionary.com
 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, ...
 
- Estoppel - Legal Dictionary | Law.com
 Estoppel includes being barred by false representation or concealment (  equitable estoppel), failure to take legal action until the other party is prejudiced   by the ...
 
- Estoppel - Merriam-Webster Online
 Definition of ESTOPPEL. : a legal bar to alleging or denying a fact because of   one's own previous actions or words to the contrary. Origin of ESTOPPEL ...
 
- Promissory Estoppel and Detrimental Reliance
 Explanation of promissory estoppel with summaries of several landmark cases.
 
- Estoppel Definition
 The legal definition of Estoppel is A rule of law that when person A, by act or   words, gives person B reason to believe a certain set of facts upon which person   B ...