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preemption

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noun pre·emp·tion \-ˈem(p)-shən\

Definition of preemption

  1. 1 a :  the right of purchasing before others; especially :  one given by the government to the actual settler upon a tract of public land b :  the purchase of something under this right

  2. 2 :  a prior seizure or appropriation :  a taking possession before others

  3. 3 :  a doctrine in law according to which federal law supersedes state law when federal law is in conflict with a state law

  4. 4 :  a policy of launching a preemptive attack in order to prevent a suspected imminent attack



Examples of preemption in a sentence

  1. <longtime residents resented the preemption of their urban neighborhood by this influx of affluent yuppies>



Origin and Etymology of preemption

Medieval Latin praeemption-, praeemptio previous purchase, from praeemere to buy before, from Latin prae- pre- + emere to buy — more at redeem


First Known Use: 1602


Law Dictionary

preemption

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noun pre·emp·tion \prē-ˈemp-shən\

Legal Definition of preemption

  1. 1a :  the right of purchasing before others :  preemptive right b :  a right to purchase a tract of public land before others that was given by the government to the actual occupant of the land Editor's note: This sense of preemption is primarily of historical importance.

  2. 2 :  a doctrine in conflicts of law: when a superior government (as of a state) has undertaken to regulate a subject its laws supersede those of an inferior government (as of a municipality) Editor's note: According to the doctrine of preemption, federal law supersedes state law when federal law is in conflict with a state law on a subject or when there is congressional intent to regulate a subject to the exclusion of the states. Federal preemption is based on the supremacy clause of the U.S. Constitution and is closely related to the powers granted Congress in the commerce clause.

  3. 3 :  an act or instance of preempting



Origin and Etymology of preemption

Medieval Latin praeemption- praeemptio previous purchase, from praeemere to buy before



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