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That cannot be annulled or made void: an indefeasible claim; indefeasible rights.

in′de·fea′si·bil′i·ty n.
in′de·fea′si·bly adv.
References in periodicals archive ?
In order to prevent or diminish the transposition to practice of inconveniences generated by the co-ownership status, the civil law giver has instituted, in the matter of co-ownership division of joint property in Article 669 of the New Civil Code, and in matters of inheritance partition by Article 1143, paragraph 1 of the same Code the imperative rule of indefeasibility of the right to seek partition.
138) In other words, the danger of illegal secrets is not simply about the merits of particular disclosures; even when shallow, such secrets can play a troubling role in a broader contest regarding the legality and indefeasibility of executive power.
The land titles system is based on three principles which comprise the doctrine of indefeasibility of title: the mirror, curtain, and insurance principles.
The convention adopted here is to retain the y variable labels for nodes appearing in the reduplicant-specific structure, to reflect their indefeasibility.
For example, whereas Justice Adam had to traverse a rough and rocky road before concluding that section 43 justified the inference that section 42 only conferred indefeasibility on purchasers but not on volunteers, some commentators have suggested that section 43 expressly refers to purchasers.
the case for immediate indefeasibility is not based on irrefutable logic, but must depend on value judgments concerning the weight of conflicting policies.