say it: pree-EMP-shuhn
preemption is a noun meaning "the judicial principle asserting the supremacy of federal over state legislation on the same subject". It carries 4 recorded senses.
the judicial principle asserting the supremacy of federal over state legislation on the same subject
law
the right of a government to seize or appropriate something (as property)
the right to purchase something in advance of others
a prior appropriation of something
“the preemption of bandwidth by commercial interests”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for preemption come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.