| 单词 | preemptions | 
| 释义 | preemptionnoun  pre·emp·tion  prē-ˈem(p)-shən  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   : a prior seizure or appropriation : a taking possession before others   3  a    : a doctrine in law according to which federal law supersedes state law when federal law is in conflict with a state law  Even without an express provision for preemption, we have found that state law must yield to a congressional Act in at least two circumstances.  called also federal preemption  b    : a doctrine in law according to which the legislation of a superior government (such as a state government) supersedes that of an inferior government (such as a municipal government) in conflicts of law   4   : a policy of launching a preemptive attack in order to prevent a suspected imminent attack   preemptions nounas in takeoversthe unlawful taking or withholding of something from the rightful owner under a guise of authority longtime residents resented the preemption of their urban neighborhood by this influx of affluent yuppies Synonyms & Similar Words Relevance 
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