Preemption meaning

prē-ĕmpshən
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The action of preempting, as the use of military force in a preemptive attack.
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Prior seizure of, appropriation of, or claim to something, such as property.
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The doctrine that federal law takes precedence over state law.
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The act or right of buying land, etc. before, or in preference to, others; esp., such a right granted to a settler on public land.
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Action taken for the purpose of preventing something else from happening.
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In law, the doctrine coming from the Supremacy Clause of the United States Constitution asserting that in legislation on the same subject, federal legislation takes supremacy over state or local laws.
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The right to buy something before anybody else.
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An earlier seizure of some property, real or personal.
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The purchase of something before it is offered for sale to others.
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The purchase of public land by the occupant.
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(computing) The temporary interruption of a task without its cooperation and with the intention of resuming it at a later time.
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(law) The displacement of a lower jurisdiction's laws when they conflict with those of a higher jurisdiction.
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Origin of preemption

  • pre– Latin ēmptiō ēmptiōn- buying (from ēmptus) (past participle of emere to buy em- in Indo-European roots)

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Medieval Latin praeÄ“mptiō (“previous purchase"), from praeemō (“buy before"), from Latin prae- (“before") + emō (“buy").

    From Wiktionary