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Potentially subject to defeat, termination, or Annulment upon the occurrence of a future action or event, or the performance of a condition subsequent.The most common legal application of the term is with respect to estates as interest in land, such as in the case of a conveyance or a life estate, which is defeasible upon the happening of a certain specified event, for example, the death of the person holding such an interest.

West's Encyclopedia of American Law, edition 2. Copyright 2008 The Gale Group, Inc. All rights reserved.


Collins Dictionary of Law © W.J. Stewart, 2006

DEFEASIBLE. What may be undone or annulled.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
Para solucao da lacuna teorica relativa a inexistencia de universidade congenere no local para onde o servidor civil ou o militar forem transferidos no interesse do servico, foi apresentada uma definicao de derrotabilidade (defeasibility), compreendida como a capacidade do texto normativo de acomodar excecoes nao expressamente previstas pelo legislador, dada sua limitacao de prever exaustivamente todas as possibilidades de excecoes futuras.
These schemes, providing the structure of the most common and prototypical patterns of defeasible reasoning, translate into a dialectical procedure (the critical questions) for the assessment of the defeasibility conditions of an argument.
The 12 essays emerged from a September 2010 conference on defeasibility in ethics, epistemology, law, and logic held in Frankfurt am Main, Germany.
Given the non-monotonicity and the defeasibility of this pattern of practical reasoning, the inferences corresponding to it can be evaluated using critical questions.
Given the objections raised in this section, it becomes clear that the apparent defeasibility of practical reasoning must be accountable in terms of some antecedent causes.
The Supreme Court has long talked about awareness of wrongdoing as a foundational requirement of criminal responsibility, by explaining the defeasibility of that requirement in a limited category of low-penalty, strict liability offenses that the Court has unhelpfully called "public welfare" offenses.
Under some forms of normative self-regulation some community prevents and denies itself a proper responsiveness to defeasibility, challenging constitutive of proper or successful experience.
Therefore, if the defeasibility of an execution lien on personal property relates to the execution's invisibility, then it does not necessarily imply the defeasibility of the tax lien, which is based on public docketing.
Defeasibility (Scott & Lyman, 1968); the accused alleges a lack of information about, or control over, important elements of the situation (Sehonbach, 1980; Tedeschi & Reiss, 1981; Semin & Manstead, 1983).
But prima facie permanence of obligations does, like all prima facie statements imply defeasibility. And this raises the question: what are the conditions under which permanence of obligations does not obtain?